Juniper JN0-364\u00a0 Exam Dumps<\/b><\/a> and Practice Test Dumps<\/b><\/p>\nQuestion: 141. Which Junos command displays the forwarding table used to determine how packets are forwarded?<\/b><\/p>\n\n- <\/b> show route forwarding-table<\/span>
\n<\/span>2.<\/b> show configuration<\/span>
\n<\/span>3.<\/b> show bgp summary<\/span>
\n<\/span>4.<\/b> show system uptime<\/span><\/li>\n<\/ol>\nCorrect Answer:<\/b> 1. <\/span>show route forwarding-table<\/span><\/p>\nExplanation:<\/b><\/p>\n
The <\/span>show route forwarding-table<\/span> command displays information from the forwarding table used by the device to make packet-forwarding decisions. It can show destination prefixes, next hops, interfaces, and other forwarding information. This differs from the routing table, which contains routes learned or configured by routing protocols and static configuration. The forwarding table represents the information actually used by the forwarding plane. This command is particularly useful when troubleshooting situations where the routing table appears correct but traffic is not being forwarded as expected.<\/span><\/p>\nQuestion: 142. Which BGP attribute provides information about the preferred entry point into an autonomous system?<\/b><\/p>\n\n- <\/b> Local Preference<\/span>
\n<\/span>2.<\/b> MED<\/span>
\n<\/span>3.<\/b> AS_PATH<\/span>
\n<\/span>4.<\/b> NEXT_HOP<\/span><\/li>\n<\/ol>\nCorrect Answer:<\/b> 2. MED<\/span><\/p>\nExplanation:<\/b><\/p>\n
The Multi-Exit Discriminator, or MED, is a BGP attribute that can be used to communicate a preference for how traffic should enter an autonomous system when multiple links exist between autonomous systems. A lower MED is generally preferred when comparing otherwise eligible paths from the same neighboring autonomous system. MED is different from Local Preference, which is primarily used inside an autonomous system to influence outbound path selection. MED should therefore be understood as an attribute that can influence inbound traffic selection.<\/span><\/p>\nQuestion: 143. Which OSPF area is normally used as the backbone for inter-area routing?<\/b><\/p>\n\n- <\/b> Area 1<\/span>
\n<\/span>2.<\/b> Area 100<\/span>
\n<\/span>3.<\/b> Area 0<\/span>
\n<\/span>4.<\/b> Area 255<\/span><\/li>\n<\/ol>\nCorrect Answer:<\/b> 3. Area 0<\/span><\/p>\nExplanation:<\/b><\/p>\n
OSPF Area 0, also called the backbone area, is the central area used for inter-area routing in a hierarchical OSPF design. Other OSPF areas normally connect to Area 0 through Area Border Routers. The backbone allows routing information to be exchanged between different OSPF areas while helping the network scale more efficiently. Although other area numbers can be configured, Area 0 has a special role in OSPF’s hierarchical architecture.<\/span><\/p>\nQuestion: 144. Which IPv6 address is the loopback address?<\/b><\/p>\n\n- <\/b> FE80::1<\/span>
\n<\/span>2.<\/b> FF02::1<\/span>
\n<\/span>3.<\/b> FC00::1<\/span>
\n<\/span>4.<\/b> ::1<\/span><\/li>\n<\/ol>\nCorrect Answer:<\/b> 4. <\/span>::1<\/span><\/p>\nExplanation:<\/b><\/p>\n
The IPv6 loopback address is <\/span>::1<\/span>. It is equivalent in purpose to the IPv4 loopback address <\/span>127.0.0.1<\/span> and is used by a host to send traffic to itself. Loopback traffic does not require a physical network interface or an external router. <\/span>FE80::\/10<\/span> is the IPv6 link-local range, <\/span>FF00::\/8<\/span> is used for multicast, and <\/span>FC00::\/7<\/span> is associated with unique local addresses. Recognizing special IPv6 addresses is important for troubleshooting and configuration.<\/span><\/p>\nQuestion: 145. Which Junos command is useful for viewing the MAC addresses learned by a switch?<\/b><\/p>\n\n- <\/b> show route<\/span>
\n<\/span>2.<\/b> show ethernet-switching table<\/span>
\n<\/span>3.<\/b> show ospf neighbor<\/span>
\n<\/span>4.<\/b> show system alarms<\/span><\/li>\n<\/ol>\nCorrect Answer:<\/b> 2. <\/span>show ethernet-switching table<\/span><\/p>\nExplanation:<\/b><\/p>\n
The <\/span>show ethernet-switching table<\/span> command displays learned Layer 2 MAC-address information. The output can help identify which interfaces or switching contexts have learned particular MAC addresses. This is useful when diagnosing Layer 2 connectivity, VLAN problems, unexpected MAC movement, or forwarding behavior. The routing table commands focus on Layer 3 information, while OSPF commands display routing-protocol state. MAC learning is a fundamental switching function and is separate from IP route calculation.<\/span><\/p>\nQuestion: 146. What happens when an OSPF router receives a valid Link-State Update containing new LSAs?<\/b><\/p>\n\n- <\/b> It ignores the information until BGP advertises the same routes<\/span>
\n<\/span>2.<\/b> It can update its link-state database and recalculate routes when necessary<\/span>
\n<\/span>3.<\/b> It converts the LSAs into DHCP messages<\/span>
\n<\/span>4.<\/b> It automatically creates a new autonomous system<\/span><\/li>\n<\/ol>\nCorrect Answer:<\/b> 2. It can update its link-state database and recalculate routes when necessary<\/span><\/p>\nExplanation:<\/b><\/p>\n
OSPF Link-State Update packets carry LSAs that describe topology or routing information. When a router receives valid new or changed LSAs, it can update its link-state database and, when the topology change affects routing, perform an SPF calculation to determine new paths. The updated information can also be flooded to other appropriate OSPF neighbors. OSPF operates independently of BGP, DHCP, and autonomous-system creation, so those functions are not required for normal OSPF LSA processing.<\/span><\/p>\nQuestion: 147. Which Junos routing-table instance is normally used for IPv4 unicast routes?<\/b><\/p>\n\n- <\/b> inet6.0<\/span>
\n<\/span>2.<\/b> mpls.0<\/span>
\n<\/span>3.<\/b> inet.0<\/span>
\n<\/span>4.<\/b> iso.0<\/span><\/li>\n<\/ol>\nCorrect Answer:<\/b> 3. <\/span>inet.0<\/span><\/p>\nExplanation:<\/b><\/p>\n
The Junos <\/span>inet.0<\/span> routing table is the primary routing table for IPv4 unicast routes in the default routing instance. IPv6 unicast routes are normally stored in <\/span>inet6.0<\/span>. Other routing tables are associated with different protocol families or forwarding functions. Knowing the correct routing-table name is useful when examining routes and troubleshooting protocol behavior in Junos. For example, an administrator can use commands such as <\/span>show route table inet.0<\/span> to inspect IPv4 unicast routing information.<\/span><\/p>\nQuestion: 148. What is the main purpose of VRRP on a network?<\/b><\/p>\n\n- <\/b> To provide first-hop gateway redundancy<\/span>
\n<\/span>2.<\/b> To exchange external BGP routes<\/span>
\n<\/span>3.<\/b> To calculate OSPF shortest paths<\/span>
\n<\/span>4.<\/b> To aggregate Ethernet links<\/span><\/li>\n<\/ol>\nCorrect Answer:<\/b> 1. To provide first-hop gateway redundancy<\/span><\/p>\nExplanation:<\/b><\/p>\n
Virtual Router Redundancy Protocol, or VRRP, provides gateway redundancy by allowing multiple routers to participate in a virtual router configuration. Hosts can use a virtual IP address as their default gateway while one router performs the active forwarding role and another can take over if necessary. This improves gateway availability without requiring hosts to change their configured default gateway. VRRP does not perform route aggregation, BGP exchange, or OSPF path calculation.<\/span><\/p>\nQuestion: 149. Which OSPF packet is used to acknowledge the receipt of LSAs?<\/b><\/p>\n\n- <\/b> Hello<\/span>
\n<\/span>2.<\/b> Database Description<\/span>
\n<\/span>3.<\/b> Link-State Acknowledgment<\/span>
\n<\/span>4.<\/b> Link-State Request<\/span><\/li>\n<\/ol>\nCorrect Answer:<\/b> 3. Link-State Acknowledgment<\/span><\/p>\nExplanation:<\/b><\/p>\n
The OSPF Link-State Acknowledgment packet is used to acknowledge receipt of LSAs. Reliable flooding is important because routers need consistent link-state information throughout an OSPF area. Acknowledgments allow routers to confirm that LSAs have been received, helping the protocol maintain reliable synchronization of its link-state database. Hello packets discover and maintain neighbors, Database Description packets summarize database contents, and Link-State Request packets ask neighbors for specific LSAs.<\/span><\/p>\nQuestion: 150. Which BGP relationship is established between routers located in different autonomous systems?<\/b><\/p>\n\n- <\/b> iBGP<\/span>
\n<\/span>2.<\/b> OSPF<\/span>
\n<\/span>3.<\/b> IS-IS<\/span>
\n<\/span>4.<\/b> eBGP<\/span><\/li>\n<\/ol>\nCorrect Answer:<\/b> 4. eBGP<\/span><\/p>\nExplanation:<\/b><\/p>\n
External BGP, or eBGP, is used to exchange routing information between routers belonging to different autonomous systems. It is commonly used between an organization and an upstream provider or between separate autonomous systems operated by different organizations. Internal BGP, or iBGP, is used between BGP speakers within the same autonomous system. OSPF and IS-IS are interior gateway protocols and are not classifications of BGP sessions.<\/span><\/p>\nQuestion: 151. Which Junos command displays detailed information about installed routes for a particular destination prefix?<\/b><\/p>\n\n- <\/b> show route <prefix> detail<\/span>
\n<\/span>2.<\/b> show system uptime<\/span>
\n<\/span>3.<\/b> show interfaces terse<\/span>
\n<\/span>4.<\/b> show chassis hardware<\/span><\/li>\n<\/ol>\nCorrect Answer:<\/b> 1. <\/span>show route <prefix> detail<\/span><\/p>\nExplanation:<\/b><\/p>\n
The <\/span>show route <prefix> detail<\/span> command provides detailed information about a particular route in the Junos routing table. Depending on the route, the output can include protocol information, route preference, next-hop details, interface information, and other attributes. This is especially useful when investigating why a route was selected, why another route was rejected, or how traffic toward a specific destination will be forwarded. The other commands provide system, interface, or hardware information.<\/span><\/p>\nQuestion: 152. Which OSPF feature helps reduce the number of adjacencies on a broadcast Ethernet segment?<\/b><\/p>\n\n