Juniper JN0-364\u00a0 Exam Dumps<\/b><\/a> and Practice Test Dumps<\/b><\/p>\n <\/p>\n
Question: 21. Which Junos command is commonly used to display the current routing table?<\/b><\/p>\n\n- <\/b> show interfaces terse<\/span>
\n<\/span>2.<\/b> show route<\/span>
\n<\/span>3.<\/b> show configuration<\/span>
\n<\/span>4.<\/b> show chassis hardware<\/span><\/li>\n<\/ol>\nCorrect Answer:<\/b> 2. show route<\/span><\/p>\nExplanation:<\/b><\/p>\n
The <\/span>show route<\/span> command displays routing information maintained by the Junos device. It can show active routes, protocol information, next hops, routing preferences, and other details useful for understanding how the router reaches destinations. Additional options can be used to examine specific routes, protocols, or routing tables. <\/span>show interfaces terse<\/span> is primarily used to review interface status and addressing, while <\/span>show configuration<\/span> displays the committed configuration hierarchy. <\/span>show chassis hardware<\/span> provides information about installed hardware components. For troubleshooting an unexpected forwarding decision, examining the routing table with <\/span>show route<\/span> is often an important step.<\/span><\/p>\nQuestion: 22. Which protocol is used by Junos devices to exchange routing information between autonomous systems?<\/b><\/p>\n\n- <\/b> OSPF<\/span>
\n<\/span>2.<\/b> IS-IS<\/span>
\n<\/span>3.<\/b> BGP<\/span>
\n<\/span>4.<\/b> LACP<\/span><\/li>\n<\/ol>\nCorrect Answer:<\/b> 3. BGP<\/span><\/p>\nExplanation:<\/b><\/p>\n
Border Gateway Protocol, or BGP, is the primary routing protocol used to exchange reachability information between autonomous systems. BGP is classified as an exterior gateway protocol and is widely used by service providers, enterprises, and Internet networks. OSPF and IS-IS are interior gateway protocols normally used within an autonomous system. LACP is not a routing protocol; it negotiates and maintains link aggregation relationships. BGP uses attributes such as local preference, AS path, MED, and origin to influence route selection. Understanding the distinction between internal and external routing protocols is fundamental when troubleshooting inter-AS connectivity.<\/span><\/p>\nQuestion: 23. What does the Junos routing preference value primarily determine?<\/b><\/p>\n\n- <\/b> Which routing information source is preferred when multiple protocols provide a route to the same destination<\/span>
\n<\/span>2.<\/b> The bandwidth of a physical interface<\/span>
\n<\/span>3.<\/b> The number of BGP peers allowed on a router<\/span>
\n<\/span>4.<\/b> The MTU of an Ethernet frame<\/span><\/li>\n<\/ol>\nCorrect Answer:<\/b> 1. Which routing information source is preferred when multiple protocols provide a route to the same destination<\/span><\/p>\nExplanation:<\/b><\/p>\n
Junos uses route preference to help determine which route should become active when multiple routing protocols provide routes to the same destination. A lower preference value is generally preferred over a higher value. This mechanism is different from metrics used internally by individual routing protocols. For example, OSPF has its own cost, while BGP has multiple path-selection attributes. Route preference allows Junos to compare routes from different sources at the routing-table level. When troubleshooting route selection, it is important to distinguish route preference from protocol-specific metrics and BGP attributes.<\/span><\/p>\nQuestion: 24. Which protocol is used to negotiate the bundling of Ethernet interfaces into an aggregated Ethernet link?<\/b><\/p>\n\n- <\/b> VRRP<\/span>
\n<\/span>2.<\/b> LACP<\/span>
\n<\/span>3.<\/b> BFD<\/span>
\n<\/span>4.<\/b> LLDP<\/span><\/li>\n<\/ol>\nCorrect Answer:<\/b> 2. LACP<\/span><\/p>\nExplanation:<\/b><\/p>\n
The Link Aggregation Control Protocol, or LACP, is used to dynamically negotiate and maintain link aggregation between compatible devices. It allows multiple physical Ethernet links to operate as members of a logical aggregated connection. LACP helps verify that links are compatible and can participate in the aggregation group. VRRP provides gateway redundancy, BFD provides rapid failure detection, and LLDP exchanges information about directly connected devices. Link aggregation can improve availability and provide additional aggregate capacity, while LACP supplies the control mechanism used to establish and maintain the bundle.<\/span><\/p>\nQuestion: 25. Which OSPF metric is used to determine the preferred path toward a destination?<\/b><\/p>\n\n- <\/b> MED<\/span>
\n<\/span>2.<\/b> AS path length<\/span>
\n<\/span>3.<\/b> Local preference<\/span>
\n<\/span>4.<\/b> Cost<\/span><\/li>\n<\/ol>\nCorrect Answer:<\/b> 4. Cost<\/span><\/p>\nExplanation:<\/b><\/p>\n
OSPF uses cost as its primary metric for calculating the shortest path toward destinations. Each OSPF interface can have an associated cost, and the SPF algorithm calculates paths by adding the costs of the links along each candidate path. The path with the lowest total cost is normally preferred. Local preference, MED, and AS path length are BGP-related concepts rather than OSPF path metrics. When troubleshooting OSPF route selection, checking interface costs and the resulting SPF topology can help explain why one path is preferred over another.<\/span><\/p>\nQuestion: 26. What is the purpose of an OSPF hello packet?<\/b><\/p>\n\n- <\/b> Advertise external BGP routes<\/span>
\n<\/span>2.<\/b> Carry user application data<\/span>
\n<\/span>3.<\/b> Discover and maintain relationships with OSPF neighbors<\/span>
\n<\/span>4.<\/b> Assign IPv4 addresses to interfaces<\/span><\/li>\n<\/ol>\nCorrect Answer:<\/b> 3. Discover and maintain relationships with OSPF neighbors<\/span><\/p>\nExplanation:<\/b><\/p>\n
OSPF Hello packets are used to discover neighboring OSPF routers and maintain neighbor relationships. They contain information that helps routers determine whether they share compatible parameters, such as area membership, hello and dead intervals, and other configuration values. On networks where OSPF forms adjacencies, periodic Hello packets also help confirm that neighboring routers remain reachable. If Hello packets are not received within the configured dead interval, the neighbor can be considered unavailable. Problems involving mismatched OSPF parameters, interface configuration, or connectivity can therefore prevent successful neighbor formation.<\/span><\/p>\nQuestion: 27. Which Junos command is useful for displaying interface operational status and IP addressing in a compact format?<\/b><\/p>\n\n- <\/b> show route summary<\/span>
\n<\/span>2.<\/b> show interfaces terse<\/span>
\n<\/span>3.<\/b> show ospf database<\/span>
\n<\/span>4.<\/b> show system users<\/span><\/li>\n<\/ol>\nCorrect Answer:<\/b> 2. show interfaces terse<\/span><\/p>\nExplanation:<\/b><\/p>\n
The <\/span>show interfaces terse<\/span> command provides a compact overview of interfaces, including administrative and operational status and configured protocol addresses. It is particularly useful during initial troubleshooting because it allows an administrator to quickly identify interfaces that are down or missing expected addresses. More detailed interface information can be obtained with <\/span>show interfaces<\/span>, while routing commands such as <\/span>show route<\/span> provide information about forwarding decisions. The terse output is valuable when checking many interfaces at once because it presents essential operational information without the volume of detail produced by a full interface-status command.<\/span><\/p>\nQuestion: 28. Which BGP session type is normally used between routers belonging to different autonomous systems?<\/b><\/p>\n\n- <\/b> Internal BGP<\/span>
\n<\/span>2.<\/b> External BGP<\/span>
\n<\/span>3.<\/b> OSPF adjacency<\/span>
\n<\/span>4.<\/b> IS-IS adjacency<\/span><\/li>\n<\/ol>\nCorrect Answer:<\/b> 2. External BGP<\/span><\/p>\nExplanation:<\/b><\/p>\n
External BGP, or eBGP, is normally used to exchange routing information between routers belonging to different autonomous systems. Internal BGP, or iBGP, is used between BGP speakers within the same autonomous system. The distinction is important because eBGP and iBGP have different operational and route-propagation characteristics. OSPF and IS-IS are interior gateway protocols and do not represent BGP session types. When configuring eBGP, administrators must consider the peer’s autonomous system number, reachability, routing policy, and any required multihop or authentication settings.<\/span><\/p>\nQuestion: 29. Which IPv4 address is reserved for limited broadcast traffic?<\/b><\/p>\n\n- <\/b> 127.0.0.1<\/span>
\n<\/span>2.<\/b> 224.0.0.1<\/span>
\n<\/span>3.<\/b> 255.255.255.255<\/span>
\n<\/span>4.<\/b> 169.254.1.1<\/span><\/li>\n<\/ol>\nCorrect Answer:<\/b> 3. 255.255.255.255<\/span><\/p>\nExplanation:<\/b><\/p>\n
The IPv4 address <\/span>255.255.255.255<\/span> is the limited broadcast address. Packets sent to this address are intended for all IPv4 hosts on the local broadcast domain and are not routed by routers. It is commonly associated with situations where a host needs to communicate with all local hosts without knowing the subnet’s directed broadcast address. <\/span>127.0.0.1<\/span> is the IPv4 loopback address, addresses in <\/span>224.0.0.0\/4<\/span> are multicast addresses, and <\/span>169.254.0.0\/16<\/span> is used for IPv4 link-local addressing. Recognizing these address categories helps during network troubleshooting.<\/span><\/p>\nQuestion: 30. What is the primary purpose of route redistribution?<\/b><\/p>\n\n- <\/b> Convert IPv4 addresses into MAC addresses<\/span>
\n<\/span>2.<\/b> Transfer routing information between different routing protocols or routing domains<\/span>
\n<\/span>3.<\/b> Increase Ethernet frame size<\/span>
\n<\/span>4.<\/b> Encrypt routing protocol packets<\/span><\/li>\n<\/ol>\nCorrect Answer:<\/b> 2. Transfer routing information between different routing protocols or routing domains<\/span><\/p>\nExplanation:<\/b><\/p>\n
Route redistribution allows routes learned from one routing protocol or routing source to be introduced into another routing protocol. For example, an administrator might redistribute static routes or routes learned through one IGP into another routing domain. Redistribution must be designed carefully because it can introduce routing loops, suboptimal paths, excessive route information, or unexpected protocol interactions. Policy controls are often used to determine which routes are redistributed and how their attributes or metrics are handled. Redistribution does not perform address resolution, encryption, or Ethernet frame modification; its purpose is to exchange routing information between different sources.<\/span><\/p>\nQuestion: 31. Which Junos routing-instance type is commonly used to create a separate virtual routing table and routing domain?<\/b><\/p>\n\n- <\/b> Virtual Router<\/span>
\n<\/span>2.<\/b> Ethernet-switching<\/span>
\n<\/span>3.<\/b> Bridge domain<\/span>
\n<\/span>4.<\/b> Forwarding<\/span><\/li>\n<\/ol>\nCorrect Answer:<\/b> 1. Virtual Router<\/span><\/p>\nExplanation:<\/b><\/p>\n
A Junos Virtual Router routing instance provides a separate routing table and routing domain on the same physical device. This allows routes and interfaces associated with one virtual routing environment to be logically separated from another. Such separation can be useful in multi-tenant networks, testing environments, or situations where independent routing domains are required. Other routing-instance types provide different functions, such as Layer 2 switching or specialized forwarding behavior. Routing instances are an important Junos mechanism for creating logical separation without requiring a separate physical router for every routing domain.<\/span><\/p>\nQuestion: 32. Which protocol is used to provide first-hop gateway redundancy for hosts on an IPv4 subnet?<\/b><\/p>\n\n- <\/b> BGP<\/span>