{"id":22549,"date":"2026-09-26T05:55:45","date_gmt":"2026-09-26T05:55:45","guid":{"rendered":"https:\/\/www.examlabs.com\/certification\/?p=22549"},"modified":"2026-09-26T05:55:45","modified_gmt":"2026-09-26T05:55:45","slug":"cisco-100-140-practice-test-questions-and-exam-dumps-part-18-q341-360","status":"publish","type":"post","link":"https:\/\/www.examlabs.com\/certification\/cisco-100-140-practice-test-questions-and-exam-dumps-part-18-q341-360\/","title":{"rendered":"Cisco 100-140 Practice Test Questions and Exam Dumps Part 18 Q341-360"},"content":{"rendered":"<h1><b>View Full <\/b><a href=\"https:\/\/www.examlabs.com\/100-140-exam-dumps\"><b>Cisco 100-140 Exam Dumps<\/b><\/a><b> and Practice Test Dumps<\/b><\/h1>\n<p>&nbsp;<\/p>\n<p><b>Question 341. Which Cisco IOS command displays the MAC address table learned by a switch?<\/b><\/p>\n<ol>\n<li><b><\/b><span style=\"font-weight: 400;\"> show ip route<\/span><\/li>\n<li><b><\/b><span style=\"font-weight: 400;\"> show mac address-table<\/span><\/li>\n<li><b><\/b><span style=\"font-weight: 400;\"> show arp<\/span><\/li>\n<li><b><\/b><span style=\"font-weight: 400;\"> show interfaces<\/span><\/li>\n<\/ol>\n<p><b>Correct Answer: 2. show mac address-table<\/b><\/p>\n<p><b>Explanation :-<\/b><\/p>\n<p><span style=\"font-weight: 400;\">The <\/span><span style=\"font-weight: 400;\">show mac address-table<\/span><span style=\"font-weight: 400;\"> command displays the Layer 2 MAC address table maintained by a Cisco switch. It shows learned MAC addresses, the associated VLAN, the type of entry, and the interface through which each MAC address was learned. Switches use this information to forward Ethernet frames toward the correct destination port. By contrast, <\/span><span style=\"font-weight: 400;\">show ip route<\/span><span style=\"font-weight: 400;\"> displays Layer 3 routing information, <\/span><span style=\"font-weight: 400;\">show arp<\/span><span style=\"font-weight: 400;\"> displays IP-to-MAC mappings, and <\/span><span style=\"font-weight: 400;\">show interfaces<\/span><span style=\"font-weight: 400;\"> provides interface statistics and operational details. Therefore, <\/span><span style=\"font-weight: 400;\">show mac address-table<\/span><span style=\"font-weight: 400;\"> is the appropriate command for examining dynamically or statically learned MAC addresses.<\/span><\/p>\n<p><b>Question 342. What is the primary purpose of a default gateway on an IPv4 host?<\/b><\/p>\n<ol>\n<li><b><\/b><span style=\"font-weight: 400;\"> To assign the host an IPv4 address automatically<\/span><\/li>\n<li><b><\/b><span style=\"font-weight: 400;\"> To translate private addresses into public addresses<\/span><\/li>\n<li><b><\/b><span style=\"font-weight: 400;\"> To provide DNS name resolution<\/span><\/li>\n<li><b><\/b><span style=\"font-weight: 400;\"> To forward traffic destined for networks outside the local subnet<\/span><\/li>\n<\/ol>\n<p><b>Correct Answer: 4. To forward traffic destined for networks outside the local subnet<\/b><\/p>\n<p><b>Explanation :-<\/b><\/p>\n<p><span style=\"font-weight: 400;\">A default gateway provides a host with the Layer 3 next hop used when the destination IP address is outside the host&#8217;s local subnet. Typically, the default gateway is the IP address of a router interface or Layer 3 switch interface connected to the local network. When a host determines that the destination is remote, it sends the packet to the default gateway for further routing. The gateway does not normally assign addresses, perform DNS resolution, or automatically provide NAT. Those functions are associated with DHCP, DNS, and NAT services respectively. Therefore, forwarding traffic toward remote networks is the primary purpose of a default gateway.<\/span><\/p>\n<p><b>Question 343. Which protocol is commonly used by Cisco devices to automatically obtain an IPv4 address and other network parameters?<\/b><\/p>\n<ol>\n<li><b><\/b><span style=\"font-weight: 400;\"> DHCP<\/span><\/li>\n<li><b><\/b><span style=\"font-weight: 400;\"> SNMP<\/span><\/li>\n<li><b><\/b><span style=\"font-weight: 400;\"> NTP<\/span><\/li>\n<li><b><\/b><span style=\"font-weight: 400;\"> CDP<\/span><\/li>\n<\/ol>\n<p><b>Correct Answer: 1. DHCP<\/b><\/p>\n<p><b>Explanation :-<\/b><\/p>\n<p><span style=\"font-weight: 400;\">Dynamic Host Configuration Protocol (DHCP) allows network devices and hosts to obtain IPv4 configuration information automatically. A DHCP server can provide an IP address, subnet mask, default gateway, DNS server addresses, and other parameters. This eliminates the need to configure every endpoint manually. SNMP is primarily used for network monitoring and management, NTP synchronizes clocks, and CDP is used by Cisco devices to discover directly connected Cisco neighbors. DHCP is therefore the protocol commonly associated with automatically assigning IPv4 addressing information and related network parameters.<\/span><\/p>\n<p><b>Question 344. Which subnet mask corresponds to a \/26 IPv4 prefix?<\/b><\/p>\n<ol>\n<li><b><\/b><span style=\"font-weight: 400;\"> 255.255.255.128<\/span><\/li>\n<li><b><\/b><span style=\"font-weight: 400;\"> 255.255.255.224<\/span><\/li>\n<li><b><\/b><span style=\"font-weight: 400;\"> 255.255.255.192<\/span><\/li>\n<li><b><\/b><span style=\"font-weight: 400;\"> 255.255.255.240<\/span><\/li>\n<\/ol>\n<p><b>Correct Answer: 3. 255.255.255.192<\/b><\/p>\n<p><b>Explanation :-<\/b><\/p>\n<p><span style=\"font-weight: 400;\">A <\/span><span style=\"font-weight: 400;\">\/26<\/span><span style=\"font-weight: 400;\"> IPv4 prefix contains 26 network bits and 6 host bits. In dotted-decimal notation, the first 24 bits produce <\/span><span style=\"font-weight: 400;\">255.255.255<\/span><span style=\"font-weight: 400;\">, while the remaining two network bits in the final octet produce <\/span><span style=\"font-weight: 400;\">192<\/span><span style=\"font-weight: 400;\">. Therefore, the corresponding subnet mask is <\/span><span style=\"font-weight: 400;\">255.255.255.192<\/span><span style=\"font-weight: 400;\">. This subnet provides 64 total addresses per subnet, of which 62 are normally usable for hosts in a traditional IPv4 subnet. A <\/span><span style=\"font-weight: 400;\">\/25<\/span><span style=\"font-weight: 400;\"> uses <\/span><span style=\"font-weight: 400;\">255.255.255.128<\/span><span style=\"font-weight: 400;\">, <\/span><span style=\"font-weight: 400;\">\/27<\/span><span style=\"font-weight: 400;\"> uses <\/span><span style=\"font-weight: 400;\">255.255.255.224<\/span><span style=\"font-weight: 400;\">, and <\/span><span style=\"font-weight: 400;\">\/28<\/span><span style=\"font-weight: 400;\"> uses <\/span><span style=\"font-weight: 400;\">255.255.255.240<\/span><span style=\"font-weight: 400;\">.<\/span><\/p>\n<p><b>Question 345. Which Cisco IOS command is used to save the current running configuration to NVRAM?<\/b><\/p>\n<ol>\n<li><b><\/b><span style=\"font-weight: 400;\"> copy startup-config running-config<\/span><\/li>\n<li><b><\/b><span style=\"font-weight: 400;\"> erase startup-config<\/span><\/li>\n<li><b><\/b><span style=\"font-weight: 400;\"> reload<\/span><\/li>\n<li><b><\/b><span style=\"font-weight: 400;\"> copy running-config startup-config<\/span><\/li>\n<\/ol>\n<p><b>Correct Answer: 4. copy running-config startup-config<\/b><\/p>\n<p><b>Explanation :-<\/b><\/p>\n<p><span style=\"font-weight: 400;\">The <\/span><span style=\"font-weight: 400;\">copy running-config startup-config<\/span><span style=\"font-weight: 400;\"> command saves the currently active configuration in RAM to the startup configuration stored in NVRAM. This is important because the running configuration is lost if a device is rebooted without being saved. The startup configuration is loaded during the normal boot process. The reverse command, <\/span><span style=\"font-weight: 400;\">copy startup-config running-config<\/span><span style=\"font-weight: 400;\">, copies the saved configuration into the running configuration. <\/span><span style=\"font-weight: 400;\">erase startup-config<\/span><span style=\"font-weight: 400;\"> removes the saved configuration, while <\/span><span style=\"font-weight: 400;\">reload<\/span><span style=\"font-weight: 400;\"> restarts the device. Therefore, <\/span><span style=\"font-weight: 400;\">copy running-config startup-config<\/span><span style=\"font-weight: 400;\"> is the standard command used to preserve configuration changes across reboots.<\/span><\/p>\n<p><b>Question 346. Which protocol provides loop prevention in a switched Ethernet network by placing redundant paths into a blocking state?<\/b><\/p>\n<ol>\n<li><b><\/b><span style=\"font-weight: 400;\"> STP<\/span><\/li>\n<li><b><\/b><span style=\"font-weight: 400;\"> DHCP<\/span><\/li>\n<li><b><\/b><span style=\"font-weight: 400;\"> ARP<\/span><\/li>\n<li><b><\/b><span style=\"font-weight: 400;\"> DNS<\/span><\/li>\n<\/ol>\n<p><b>Correct Answer: 1. STP<\/b><\/p>\n<p><b>Explanation :-<\/b><\/p>\n<p><span style=\"font-weight: 400;\">Spanning Tree Protocol (STP) prevents Layer 2 switching loops by logically blocking redundant paths while maintaining them as backup paths. Without loop prevention, redundant Ethernet connections can create broadcast storms, duplicate frames, and MAC address instability. STP elects a root bridge and calculates a loop-free topology based on path costs and bridge information. If the active path fails, STP can transition an appropriate redundant path into forwarding operation. DHCP provides host configuration, ARP resolves IPv4 addresses to MAC addresses, and DNS resolves names to IP addresses. Therefore, STP is the protocol designed for Layer 2 loop prevention.<\/span><\/p>\n<p><b>Question 347. Which IPv6 address type is used for communication with the nearest member of a group of interfaces?<\/b><\/p>\n<ol>\n<li><b><\/b><span style=\"font-weight: 400;\"> Global unicast<\/span><\/li>\n<li><b><\/b><span style=\"font-weight: 400;\"> Multicast<\/span><\/li>\n<li><b><\/b><span style=\"font-weight: 400;\"> Anycast<\/span><\/li>\n<li><b><\/b><span style=\"font-weight: 400;\"> Link-local<\/span><\/li>\n<\/ol>\n<p><b>Correct Answer: 3. Anycast<\/b><\/p>\n<p><b>Explanation :-<\/b><\/p>\n<p><span style=\"font-weight: 400;\">An IPv6 anycast address identifies multiple interfaces, and packets sent to that address are delivered to the nearest interface according to the routing topology. Anycast is useful when multiple devices provide the same service and clients should reach an appropriate or topologically closest instance. A global unicast address identifies a specific globally routable interface, while a link-local address is used for communication on the local link and is not routed globally. IPv6 multicast addresses identify groups of interfaces and deliver packets to members of the multicast group. Therefore, anycast provides the one-to-nearest communication behavior described in the question.<\/span><\/p>\n<p><b>Question 348. Which Cisco IOS command provides a concise summary of interface status and IP addressing information?<\/b><\/p>\n<ol>\n<li><b><\/b><span style=\"font-weight: 400;\"> show version<\/span><\/li>\n<li><b><\/b><span style=\"font-weight: 400;\"> show running-config<\/span><\/li>\n<li><b><\/b><span style=\"font-weight: 400;\"> show ip interface brief<\/span><\/li>\n<li><b><\/b><span style=\"font-weight: 400;\"> show cdp neighbors<\/span><\/li>\n<\/ol>\n<p><b>Correct Answer: 3. show ip interface brief<\/b><\/p>\n<p><b>Explanation :-<\/b><\/p>\n<p><span style=\"font-weight: 400;\">The <\/span><span style=\"font-weight: 400;\">show ip interface brief<\/span><span style=\"font-weight: 400;\"> command provides a concise overview of interfaces, including interface names, assigned IP addresses, administrative status, and line protocol status. It is frequently used to quickly determine whether interfaces are operational and whether their IP addresses are configured correctly. <\/span><span style=\"font-weight: 400;\">show version<\/span><span style=\"font-weight: 400;\"> provides system and software information, <\/span><span style=\"font-weight: 400;\">show running-config<\/span><span style=\"font-weight: 400;\"> displays the active configuration, and <\/span><span style=\"font-weight: 400;\">show cdp neighbors<\/span><span style=\"font-weight: 400;\"> provides information about directly connected Cisco devices. Because it presents interface addressing and operational state in a compact format, <\/span><span style=\"font-weight: 400;\">show ip interface brief<\/span><span style=\"font-weight: 400;\"> is one of the most useful initial troubleshooting commands on a Cisco device.<\/span><\/p>\n<p><b>Question 349. Which device primarily operates at Layer 2 of the OSI model and forwards frames based on MAC addresses?<\/b><\/p>\n<ol>\n<li><b><\/b><span style=\"font-weight: 400;\"> Router<\/span><\/li>\n<li><b><\/b><span style=\"font-weight: 400;\"> Switch<\/span><\/li>\n<li><b><\/b><span style=\"font-weight: 400;\"> Firewall<\/span><\/li>\n<li><b><\/b><span style=\"font-weight: 400;\"> DNS server<\/span><\/li>\n<\/ol>\n<p><b>Correct Answer: 2. Switch<\/b><\/p>\n<p><b>Explanation :-<\/b><\/p>\n<p><span style=\"font-weight: 400;\">A traditional Ethernet switch primarily operates at Layer 2 and makes forwarding decisions using destination MAC addresses. The switch learns source MAC addresses from incoming frames and associates them with specific ports in its MAC address table. When a destination MAC address is known, the switch forwards the frame through the appropriate port. Routers primarily make Layer 3 forwarding decisions based on IP addresses, while a DNS server provides name-resolution services. Modern multilayer switches can also perform Layer 3 routing, but their fundamental Ethernet switching function remains based on MAC addresses. Therefore, a switch is the appropriate answer.<\/span><\/p>\n<p><b>Question 350. Which IPv4 address is in the private 192.168.0.0\/16 address range?<\/b><\/p>\n<ol>\n<li><b><\/b><span style=\"font-weight: 400;\"> 192.168.25.10<\/span><\/li>\n<li><b><\/b><span style=\"font-weight: 400;\"> 172.32.10.5<\/span><\/li>\n<li><b><\/b><span style=\"font-weight: 400;\"> 11.20.30.40<\/span><\/li>\n<li><b><\/b><span style=\"font-weight: 400;\"> 198.51.100.10<\/span><\/li>\n<\/ol>\n<p><b>Correct Answer: 1. 192.168.25.10<\/b><\/p>\n<p><b>Explanation :-<\/b><\/p>\n<p><span style=\"font-weight: 400;\">The IPv4 private address ranges defined for internal networks include <\/span><span style=\"font-weight: 400;\">10.0.0.0\/8<\/span><span style=\"font-weight: 400;\">, <\/span><span style=\"font-weight: 400;\">172.16.0.0\/12<\/span><span style=\"font-weight: 400;\">, and <\/span><span style=\"font-weight: 400;\">192.168.0.0\/16<\/span><span style=\"font-weight: 400;\">. The address <\/span><span style=\"font-weight: 400;\">192.168.25.10<\/span><span style=\"font-weight: 400;\"> falls within the <\/span><span style=\"font-weight: 400;\">192.168.0.0<\/span><span style=\"font-weight: 400;\"> through <\/span><span style=\"font-weight: 400;\">192.168.255.255<\/span><span style=\"font-weight: 400;\"> range and is therefore a private IPv4 address. Private addresses are commonly used inside organizations and homes and are not directly routable across the public Internet. <\/span><span style=\"font-weight: 400;\">172.32.10.5<\/span><span style=\"font-weight: 400;\"> is outside the private <\/span><span style=\"font-weight: 400;\">172.16.0.0\/12<\/span><span style=\"font-weight: 400;\"> range, while <\/span><span style=\"font-weight: 400;\">11.20.30.40<\/span><span style=\"font-weight: 400;\"> is public address space. <\/span><span style=\"font-weight: 400;\">198.51.100.10<\/span><span style=\"font-weight: 400;\"> belongs to a documentation range rather than the RFC 1918 private ranges.<\/span><\/p>\n<p><b>Question 351. Which protocol is used to securely access a Cisco device through a remote command-line session?<\/b><\/p>\n<ol>\n<li><b><\/b><span style=\"font-weight: 400;\"> Telnet<\/span><\/li>\n<li><b><\/b><span style=\"font-weight: 400;\"> FTP<\/span><\/li>\n<li><b><\/b><span style=\"font-weight: 400;\"> TFTP<\/span><\/li>\n<li><b><\/b><span style=\"font-weight: 400;\"> SSH<\/span><\/li>\n<\/ol>\n<p><b>Correct Answer: 4. SSH<\/b><\/p>\n<p><b>Explanation :-<\/b><\/p>\n<p><span style=\"font-weight: 400;\">Secure Shell (SSH) provides encrypted remote access to a Cisco device through a command-line interface. SSH protects authentication credentials and session data by encrypting the communication between the administrator and the device. Telnet also provides remote CLI access, but it sends information in plaintext and therefore does not provide the same level of security. FTP and TFTP are file-transfer protocols rather than protocols intended primarily for interactive remote CLI access. Cisco devices commonly use SSH for secure remote administration. Consequently, SSH is the appropriate protocol when a secure remote command-line session is required.<\/span><\/p>\n<p><b>Question 352. What does ARP resolve in an IPv4 Ethernet network?<\/b><\/p>\n<ol>\n<li><b><\/b><span style=\"font-weight: 400;\"> An IPv4 address to a MAC address<\/span><\/li>\n<li><b><\/b><span style=\"font-weight: 400;\"> A hostname to an IPv6 address<\/span><\/li>\n<li><b><\/b><span style=\"font-weight: 400;\"> A MAC address to a hostname<\/span><\/li>\n<li><b><\/b><span style=\"font-weight: 400;\"> A subnet mask to a default gateway<\/span><\/li>\n<\/ol>\n<p><b>Correct Answer: 1. An IPv4 address to a MAC address<\/b><\/p>\n<p><b>Explanation :-<\/b><\/p>\n<p><span style=\"font-weight: 400;\">Address Resolution Protocol (ARP) is used in IPv4 networks to determine the Layer 2 MAC address associated with a known IPv4 address on the local network. When a device needs to send an Ethernet frame to an IPv4 destination on the local subnet, it can use an ARP request to discover the destination&#8217;s MAC address. The resulting mapping can be stored in the device&#8217;s ARP cache. DNS performs hostname-to-IP resolution, while ARP does not normally resolve hostnames. IPv6 uses Neighbor Discovery Protocol rather than ARP for this function. Therefore, ARP resolves an IPv4 address to its corresponding MAC address.<\/span><\/p>\n<p><b>Question 353. Which routing protocol uses a cost metric based primarily on bandwidth?<\/b><\/p>\n<ol>\n<li><b><\/b><span style=\"font-weight: 400;\"> RIP<\/span><\/li>\n<li><b><\/b><span style=\"font-weight: 400;\"> OSPF<\/span><\/li>\n<li><b><\/b><span style=\"font-weight: 400;\"> ARP<\/span><\/li>\n<li><b><\/b><span style=\"font-weight: 400;\"> STP<\/span><\/li>\n<\/ol>\n<p><b>Correct Answer: 2. OSPF<\/b><\/p>\n<p><b>Explanation :-<\/b><\/p>\n<p><span style=\"font-weight: 400;\">Open Shortest Path First (OSPF) uses a cost metric that is derived primarily from interface bandwidth. OSPF is a link-state routing protocol that builds a topology database and uses the Shortest Path First algorithm to calculate routes. The cost allows higher-bandwidth links to generally be preferred over lower-bandwidth links. RIP, in contrast, uses hop count as its primary metric. ARP is not a routing protocol, and STP is a Layer 2 loop-prevention protocol. Therefore, among the listed choices, OSPF is the routing protocol associated with a bandwidth-based cost metric.<\/span><\/p>\n<p><b>Question 354. Which command displays information about Cisco devices directly connected to a local Cisco device when CDP is enabled?<\/b><\/p>\n<ol>\n<li><b><\/b><span style=\"font-weight: 400;\"> show ip route<\/span><\/li>\n<li><b><\/b><span style=\"font-weight: 400;\"> show vlan brief<\/span><\/li>\n<li><b><\/b><span style=\"font-weight: 400;\"> show cdp neighbors<\/span><\/li>\n<li><b><\/b><span style=\"font-weight: 400;\"> show startup-config<\/span><\/li>\n<\/ol>\n<p><b>Correct Answer: 3. show cdp neighbors<\/b><\/p>\n<p><b>Explanation :-<\/b><\/p>\n<p><span style=\"font-weight: 400;\">The <\/span><span style=\"font-weight: 400;\">show cdp neighbors<\/span><span style=\"font-weight: 400;\"> command displays information learned through Cisco Discovery Protocol from directly connected Cisco devices. Depending on the platform and command output, this can include the neighboring device ID, local interface, neighbor port, platform, and device capabilities. CDP operates at Layer 2 and can help administrators understand the physical and logical topology of a Cisco network. <\/span><span style=\"font-weight: 400;\">show ip route<\/span><span style=\"font-weight: 400;\"> displays routing information, <\/span><span style=\"font-weight: 400;\">show vlan brief<\/span><span style=\"font-weight: 400;\"> summarizes VLAN membership, and <\/span><span style=\"font-weight: 400;\">show startup-config<\/span><span style=\"font-weight: 400;\"> displays the saved configuration. Therefore, <\/span><span style=\"font-weight: 400;\">show cdp neighbors<\/span><span style=\"font-weight: 400;\"> is the appropriate command for viewing directly connected Cisco neighbors.<\/span><\/p>\n<p><b>Question 355. Which transport-layer protocol provides reliable, connection-oriented delivery?<\/b><\/p>\n<ol>\n<li><b><\/b><span style=\"font-weight: 400;\"> UDP<\/span><\/li>\n<li><b><\/b><span style=\"font-weight: 400;\"> ICMP<\/span><\/li>\n<li><b><\/b><span style=\"font-weight: 400;\"> IP<\/span><\/li>\n<li><b><\/b><span style=\"font-weight: 400;\"> TCP<\/span><\/li>\n<\/ol>\n<p><b>Correct Answer: 4. TCP<\/b><\/p>\n<p><b>Explanation :-<\/b><\/p>\n<p><span style=\"font-weight: 400;\">Transmission Control Protocol (TCP) provides reliable, connection-oriented transport between applications. TCP establishes a connection before transmitting application data and uses mechanisms such as sequence numbers, acknowledgments, retransmission, and flow control to support reliable delivery. User Datagram Protocol (UDP) is connectionless and does not provide TCP&#8217;s reliability mechanisms. IP operates at the network layer and provides packet delivery between networks, while ICMP is used for network control and diagnostic messaging. Applications such as HTTP and HTTPS can use TCP depending on the protocol version and transport architecture. Therefore, TCP is the transport-layer protocol described.<\/span><\/p>\n<p><b>Question 356. Which Cisco feature can limit the number of MAC addresses learned on a switch port?<\/b><\/p>\n<ol>\n<li><b><\/b><span style=\"font-weight: 400;\"> Port security<\/span><\/li>\n<li><b><\/b><span style=\"font-weight: 400;\"> NAT<\/span><\/li>\n<li><b><\/b><span style=\"font-weight: 400;\"> DHCP relay<\/span><\/li>\n<li><b><\/b><span style=\"font-weight: 400;\"> NTP<\/span><\/li>\n<\/ol>\n<p><b>Correct Answer: 1. Port security<\/b><\/p>\n<p><b>Explanation :-<\/b><\/p>\n<p><span style=\"font-weight: 400;\">Cisco switch port security can restrict the number of secure MAC addresses allowed on an interface. It can also specify how secure MAC addresses are learned and define an action when an unauthorized MAC address violates the configured policy. This feature is commonly used to control which devices can connect to access ports and to reduce unauthorized access at the Layer 2 edge. NAT translates addresses between different address spaces, DHCP relay forwards DHCP messages between clients and servers across Layer 3 boundaries, and NTP synchronizes system clocks. Therefore, port security is the feature designed to control MAC address usage on a switch port.<\/span><\/p>\n<p><b>Question 357. Which IPv4 protocol is commonly used to test reachability between two IP devices?<\/b><\/p>\n<ol>\n<li><b><\/b><span style=\"font-weight: 400;\"> FTP<\/span><\/li>\n<li><b><\/b><span style=\"font-weight: 400;\"> DNS<\/span><\/li>\n<li><b><\/b><span style=\"font-weight: 400;\"> ICMP<\/span><\/li>\n<li><b><\/b><span style=\"font-weight: 400;\"> SNMP<\/span><\/li>\n<\/ol>\n<p><b>Correct Answer: 3. ICMP<\/b><\/p>\n<p><b>Explanation :-<\/b><\/p>\n<p><span style=\"font-weight: 400;\">Internet Control Message Protocol (ICMP) is commonly used for network diagnostics and reachability testing. The <\/span><span style=\"font-weight: 400;\">ping<\/span><span style=\"font-weight: 400;\"> utility uses ICMP Echo Request and Echo Reply messages in traditional IPv4 operation to determine whether a destination is reachable and to measure round-trip response time. ICMP also carries other control and error-reporting messages. FTP is used for file transfer, DNS provides name resolution, and SNMP is used for network management and monitoring. Although a successful ping does not prove that every application service is functioning, it provides useful evidence about IP-level connectivity. Therefore, ICMP is the protocol associated with standard IPv4 ping testing.<\/span><\/p>\n<p><b>Question 358. What is the main purpose of a VLAN on a switch?<\/b><\/p>\n<ol>\n<li><b><\/b><span style=\"font-weight: 400;\"> To increase the physical cable length<\/span><\/li>\n<li><b><\/b><span style=\"font-weight: 400;\"> To create separate logical Layer 2 broadcast domains<\/span><\/li>\n<li><b><\/b><span style=\"font-weight: 400;\"> To replace the routing table<\/span><\/li>\n<li><b><\/b><span style=\"font-weight: 400;\"> To encrypt all Ethernet frames<\/span><\/li>\n<\/ol>\n<p><b>Correct Answer: 2. To create separate logical Layer 2 broadcast domains<\/b><\/p>\n<p><b>Explanation :-<\/b><\/p>\n<p><span style=\"font-weight: 400;\">A Virtual Local Area Network (VLAN) logically separates a switched network into distinct Layer 2 broadcast domains. Devices in different VLANs are separated at Layer 2, even when they are connected to the same physical switch. Communication between different VLANs normally requires a Layer 3 device, such as a router or multilayer switch. VLANs do not inherently encrypt Ethernet traffic, replace routing tables, or extend the physical limitations of Ethernet cabling. By providing logical segmentation, VLANs can improve network organization, reduce broadcast-domain size, and support different administrative or security boundaries within the same switching infrastructure.<\/span><\/p>\n<p><b>Question 359. Which IPv6 address prefix is used for link-local unicast addresses?<\/b><\/p>\n<ol>\n<li><b><\/b><span style=\"font-weight: 400;\"> 2000::\/3<\/span><\/li>\n<li><b><\/b><span style=\"font-weight: 400;\"> FC00::\/7<\/span><\/li>\n<li><b><\/b><span style=\"font-weight: 400;\"> FF00::\/8<\/span><\/li>\n<li><b><\/b><span style=\"font-weight: 400;\"> FE80::\/10<\/span><\/li>\n<\/ol>\n<p><b>Correct Answer: 4. FE80::\/10<\/b><\/p>\n<p><b>Explanation :-<\/b><\/p>\n<p><span style=\"font-weight: 400;\">IPv6 link-local unicast addresses use the <\/span><span style=\"font-weight: 400;\">FE80::\/10<\/span><span style=\"font-weight: 400;\"> prefix. These addresses are automatically assigned or manually configured on IPv6-enabled interfaces and are used for communication on the local network segment. Link-local addresses are not intended to be routed between different IPv6 networks. The <\/span><span style=\"font-weight: 400;\">2000::\/3<\/span><span style=\"font-weight: 400;\"> range is used for global unicast addresses, <\/span><span style=\"font-weight: 400;\">FC00::\/7<\/span><span style=\"font-weight: 400;\"> is associated with unique local addresses, and <\/span><span style=\"font-weight: 400;\">FF00::\/8<\/span><span style=\"font-weight: 400;\"> is used for multicast addresses. Link-local addressing is important for IPv6 neighbor discovery and routing protocols. Therefore, <\/span><span style=\"font-weight: 400;\">FE80::\/10<\/span><span style=\"font-weight: 400;\"> is the correct prefix.<\/span><\/p>\n<p><b>Question 360. Which Cisco IOS command displays the current configuration stored in RAM?<\/b><\/p>\n<ol>\n<li><b><\/b><span style=\"font-weight: 400;\"> show startup-config<\/span><\/li>\n<li><b><\/b><span style=\"font-weight: 400;\"> show flash<\/span><\/li>\n<li><b><\/b><span style=\"font-weight: 400;\"> show running-config<\/span><\/li>\n<li><b><\/b><span style=\"font-weight: 400;\"> show version<\/span><\/li>\n<\/ol>\n<p><b>Correct Answer: 3. show running-config<\/b><\/p>\n<p><b>Explanation :-<\/b><\/p>\n<p><span style=\"font-weight: 400;\">The <\/span><span style=\"font-weight: 400;\">show running-config<\/span><span style=\"font-weight: 400;\"> command displays the active configuration currently stored in RAM on a Cisco device. It reflects configuration changes that have been made during the current session, including changes that have not yet been saved to NVRAM. The <\/span><span style=\"font-weight: 400;\">show startup-config<\/span><span style=\"font-weight: 400;\"> command displays the saved configuration that will normally be loaded after a reboot. <\/span><span style=\"font-weight: 400;\">show flash<\/span><span style=\"font-weight: 400;\"> provides information about files stored in flash memory, while <\/span><span style=\"font-weight: 400;\">show version<\/span><span style=\"font-weight: 400;\"> displays system, hardware, and software information. Administrators commonly use <\/span><span style=\"font-weight: 400;\">show running-config<\/span><span style=\"font-weight: 400;\"> to inspect the active configuration before saving or troubleshooting a Cisco device.<\/span><\/p>\n<p>&nbsp;<\/p>\n","protected":false},"excerpt":{"rendered":"<p>View Full Cisco 100-140 Exam Dumps and Practice Test Dumps &nbsp; Question 341. Which Cisco IOS command displays the MAC address table learned by a switch? show ip route show mac address-table show arp show interfaces Correct Answer: 2. show mac address-table Explanation :- The show mac address-table command displays the Layer 2 MAC address [&hellip;]<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":[],"categories":[1648,1647],"tags":[],"_links":{"self":[{"href":"https:\/\/www.examlabs.com\/certification\/wp-json\/wp\/v2\/posts\/22549"}],"collection":[{"href":"https:\/\/www.examlabs.com\/certification\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.examlabs.com\/certification\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.examlabs.com\/certification\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/www.examlabs.com\/certification\/wp-json\/wp\/v2\/comments?post=22549"}],"version-history":[{"count":1,"href":"https:\/\/www.examlabs.com\/certification\/wp-json\/wp\/v2\/posts\/22549\/revisions"}],"predecessor-version":[{"id":22550,"href":"https:\/\/www.examlabs.com\/certification\/wp-json\/wp\/v2\/posts\/22549\/revisions\/22550"}],"wp:attachment":[{"href":"https:\/\/www.examlabs.com\/certification\/wp-json\/wp\/v2\/media?parent=22549"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.examlabs.com\/certification\/wp-json\/wp\/v2\/categories?post=22549"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.examlabs.com\/certification\/wp-json\/wp\/v2\/tags?post=22549"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}