Juniper JN0-364\u00a0 Exam Dumps<\/b><\/a> and Practice Test Dumps<\/b><\/p>\nQuestion: 101. Which Junos command displays the current BGP routing table entries?<\/b><\/p>\n\n- <\/b> show bgp summary<\/span>
\n<\/span>2.<\/b> show route protocol bgp<\/span>
\n<\/span>3.<\/b> show interfaces terse<\/span>
\n<\/span>4.<\/b> show ospf neighbor<\/span><\/li>\n<\/ol>\nCorrect Answer:<\/b> 2. <\/span>show route protocol bgp<\/span><\/p>\nExplanation:<\/b><\/p>\n
The <\/span>show route protocol bgp<\/span> command displays routes learned through BGP in the Junos routing table. It is useful when troubleshooting BGP route learning, verifying imported prefixes, and determining which BGP routes are currently installed. The <\/span>show bgp summary<\/span> command provides session and peer information rather than the complete set of BGP-learned routes. By examining routes learned from BGP, an administrator can verify whether routing policies and BGP sessions are producing the expected routing information.<\/span><\/p>\nQuestion: 102. Which BGP attribute is normally used to identify the originating autonomous system path and help prevent routing loops?<\/b><\/p>\n\n- <\/b> MED<\/span>
\n<\/span>2.<\/b> Local Preference<\/span>
\n<\/span>3.<\/b> AS_PATH<\/span>
\n<\/span>4.<\/b> NEXT_HOP<\/span><\/li>\n<\/ol>\nCorrect Answer:<\/b> 3. AS_PATH<\/span><\/p>\nExplanation:<\/b><\/p>\n
The BGP AS_PATH attribute records the autonomous systems that a route advertisement has traversed. When a BGP router receives a route containing its own autonomous system number in the AS_PATH, it can reject the route as a potential routing loop. AS_PATH is also used as one of the factors in BGP path selection, with shorter paths generally preferred when comparing otherwise suitable routes. This makes the attribute important for both loop prevention and route selection.<\/span><\/p>\nQuestion: 103. What is the primary purpose of an OSPF Router LSA (Type 1)?<\/b><\/p>\n\n- <\/b> To advertise external routes from another routing protocol<\/span>
\n<\/span>2.<\/b> To describe the links and interfaces of a router within an OSPF area<\/span>
\n<\/span>3.<\/b> To advertise routes between autonomous systems<\/span>
\n<\/span>4.<\/b> To identify the designated router on a LAN only<\/span><\/li>\n<\/ol>\nCorrect Answer:<\/b> 2. To describe the links and interfaces of a router within an OSPF area<\/span><\/p>\nExplanation:<\/b><\/p>\n
An OSPF Type 1 Router LSA is originated by every OSPF router and describes that router’s links, interfaces, and associated OSPF information within an area. Other routers use these LSAs to build a common link-state database and calculate shortest paths using the SPF algorithm. Type 1 LSAs are area-specific and are not directly used to advertise external routes. Type 5 LSAs serve the purpose of describing external routes introduced into an OSPF domain.<\/span><\/p>\nQuestion: 104. Which Junos command is commonly used to verify OSPF neighbor relationships?<\/b><\/p>\n\n- <\/b> show ospf neighbor<\/span>
\n<\/span>2.<\/b> show route forwarding-table<\/span>
\n<\/span>3.<\/b> show bgp summary<\/span>
\n<\/span>4.<\/b> show ethernet-switching table<\/span><\/li>\n<\/ol>\nCorrect Answer:<\/b> 1. <\/span>show ospf neighbor<\/span><\/p>\nExplanation:<\/b><\/p>\n
The <\/span>show ospf neighbor<\/span> command displays information about OSPF neighbor relationships, including neighbor IDs, interface information, state, and adjacency details. It is one of the primary commands used to troubleshoot OSPF adjacency problems. States such as Full indicate that an adjacency has successfully reached the database synchronization stage. If expected neighbors are missing or remain in an incomplete state, an administrator can investigate configuration, timers, authentication, addressing, and connectivity.<\/span><\/p>\nQuestion: 105. Which IPv6 address type is designed for communication with a group of interfaces?<\/b><\/p>\n\n- <\/b> Anycast<\/span>
\n<\/span>2.<\/b> Link-local<\/span>
\n<\/span>3.<\/b> Multicast<\/span>
\n<\/span>4.<\/b> Global unicast<\/span><\/li>\n<\/ol>\nCorrect Answer:<\/b> 3. Multicast<\/span><\/p>\nExplanation:<\/b><\/p>\n
An IPv6 multicast address identifies a group of interfaces, allowing a packet to be delivered to multiple interested receivers. IPv6 relies heavily on multicast because it does not use broadcast in the same way IPv4 does. Neighbor Discovery, for example, uses multicast addresses for several functions. Link-local addresses are used for communication on the local link, global unicast addresses provide routable addressing, and anycast addresses identify a group of interfaces where traffic is delivered to the nearest appropriate member.<\/span><\/p>\nQuestion: 106. What does the OSPF Full neighbor state indicate?<\/b><\/p>\n\n- <\/b> The routers have detected each other but have not exchanged databases<\/span>
\n<\/span>2.<\/b> The routers have completed synchronization of their link-state databases<\/span>
\n<\/span>3.<\/b> The routers are using BGP instead of OSPF<\/span>
\n<\/span>4.<\/b> The OSPF interface has been administratively disabled<\/span><\/li>\n<\/ol>\nCorrect Answer:<\/b> 2. The routers have completed synchronization of their link-state databases<\/span><\/p>\nExplanation:<\/b><\/p>\n
The OSPF Full state indicates that the neighboring routers have successfully synchronized their link-state databases. Once the required database exchange is complete, the routers have the information necessary to calculate routes consistently within the OSPF area. On broadcast networks, not every OSPF router necessarily forms a Full adjacency with every other router because the DR and BDR reduce the number of required adjacencies. A persistent state below Full can indicate an adjacency or database synchronization problem.<\/span><\/p>\nQuestion: 107. Which Junos configuration hierarchy is used to configure a static IPv4 route?<\/b><\/p>\n\n- <\/b> protocols ospf<\/span>
\n<\/span>2.<\/b> routing-options static<\/span>
\n<\/span>3.<\/b> forwarding-options dhcp-relay<\/span>
\n<\/span>4.<\/b> interfaces lo0<\/span><\/li>\n<\/ol>\nCorrect Answer:<\/b> 2. <\/span>routing-options static<\/span><\/p>\nExplanation:<\/b><\/p>\n
Static routes in Junos are configured under the <\/span>routing-options static<\/span> hierarchy. A static route specifies a destination prefix and an appropriate next hop or other forwarding behavior. Static routing is useful for simple topologies, default routes, stub networks, and situations where an administrator wants explicit control over a route. OSPF, IS-IS, and BGP are dynamic routing protocols and are configured under their respective protocol hierarchies rather than under <\/span>routing-options static<\/span>.<\/span><\/p>\nQuestion: 108. Which BGP attribute is commonly used inside an autonomous system to influence the preferred outbound exit point?<\/b><\/p>\n\n- <\/b> MED<\/span>
\n<\/span>2.<\/b> AS_PATH<\/span>
\n<\/span>3.<\/b> Local Preference<\/span>
\n<\/span>4.<\/b> NEXT_HOP<\/span><\/li>\n<\/ol>\nCorrect Answer:<\/b> 3. Local Preference<\/span><\/p>\nExplanation:<\/b><\/p>\n
BGP Local Preference is used within an autonomous system to influence which exit point routers should prefer for outbound traffic. A higher Local Preference value is generally preferred when comparing eligible BGP paths. Because it is propagated through iBGP, it can provide consistent outbound path-selection behavior across the autonomous system. MED serves a different purpose by providing information about preferred entry points into an autonomous system, typically from neighboring autonomous systems.<\/span><\/p>\nQuestion: 109. Which protocol does BGP use as its transport protocol?<\/b><\/p>\n\n- <\/b> UDP<\/span>
\n<\/span>2.<\/b> ICMP<\/span>
\n<\/span>3.<\/b> TCP<\/span>
\n<\/span>4.<\/b> GRE<\/span><\/li>\n<\/ol>\nCorrect Answer:<\/b> 3. TCP<\/span><\/p>\nExplanation:<\/b><\/p>\n
BGP uses TCP as its transport protocol, specifically TCP port 179. TCP provides reliable, ordered delivery for BGP routing information exchanged between peers. Once a BGP session is established, routing updates and other protocol messages are exchanged through the TCP connection. This differs from protocols such as OSPF, which operates directly over IP rather than using TCP or UDP as its transport protocol.<\/span><\/p>\nQuestion: 110. What is the purpose of a BGP route reflector?<\/b><\/p>\n\n- <\/b> To eliminate the need for all iBGP routers to form a full mesh<\/span>
\n<\/span>2.<\/b> To replace OSPF area border routers<\/span>
\n<\/span>3.<\/b> To encrypt BGP updates<\/span>
\n<\/span>4.<\/b> To convert IPv4 routes into IPv6 routes<\/span><\/li>\n<\/ol>\nCorrect Answer:<\/b> 1. To eliminate the need for all iBGP routers to form a full mesh<\/span><\/p>\nExplanation:<\/b><\/p>\n
A BGP route reflector reduces the requirement for a full-mesh iBGP topology. Instead of every iBGP router needing a direct session with every other iBGP router, selected routers can act as route reflectors and distribute routes to their clients. This significantly reduces the number of BGP sessions required in larger autonomous systems. Route reflection does not provide encryption or protocol translation, and it does not replace the functions performed by OSPF area border routers.<\/span><\/p>\nQuestion: 111. Which Junos command provides detailed information about a specific route, including its next hop and route preference?<\/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 specified route. Depending on the route and configuration, the output can include the route’s protocol, preference, next hop, interface, metric information, and other attributes. This makes the command particularly useful when troubleshooting why a specific route was selected or determining how traffic toward a destination will be forwarded. The other commands provide system, interface, or hardware information rather than detailed route information.<\/span><\/p>\nQuestion: 112. Which IPv4 prefix represents the RFC 1918 private address space used for many internal networks?<\/b><\/p>\n\n- <\/b> 192.0.2.0\/24<\/span>
\n<\/span>2.<\/b> 172.16.0.0\/12<\/span>
\n<\/span>3.<\/b> 198.51.100.0\/24<\/span>
\n<\/span>4.<\/b> 203.0.113.0\/24<\/span><\/li>\n<\/ol>\n