Juniper JN0-364\u00a0 Exam Dumps<\/b><\/a> and Practice Test Dumps<\/b><\/p>\nQuestion: 221. Which BGP attribute is primarily used to identify the next-hop router for reaching a destination network?<\/b><\/p>\n\n- <\/b> Origin<\/span>
\n<\/span>2.<\/b> MED<\/span>
\n<\/span>3.<\/b> NEXT_HOP<\/span>
\n<\/span>4.<\/b> Local Preference<\/span><\/li>\n<\/ol>\nCorrect Answer:<\/b> 3. NEXT_HOP<\/span><\/p>\nExplanation:<\/b><\/p>\n
The BGP NEXT_HOP attribute identifies the IP address of the router that should be used as the next hop toward the advertised destination. It is an important part of BGP route installation because the receiving router must have a reachable next hop before it can use the route for forwarding. Local Preference influences outbound path selection within an autonomous system, MED can influence the preferred entry point from a neighboring AS, and Origin describes how a route was introduced into BGP. Troubleshooting an unusable BGP route often includes verifying that its NEXT_HOP address is reachable.<\/span><\/p>\nQuestion: 222. Which Junos command displays the BGP routing table summary, including the number of established peers?<\/b><\/p>\n\n- <\/b> show bgp summary<\/span>
\n<\/span>2.<\/b> show route summary<\/span>
\n<\/span>3.<\/b> show ospf neighbor<\/span>
\n<\/span>4.<\/b> show interfaces terse<\/span><\/li>\n<\/ol>\nCorrect Answer:<\/b> 1. <\/span>show bgp summary<\/span><\/p>\nExplanation:<\/b><\/p>\n
The <\/span>show bgp summary<\/span> command provides a concise overview of BGP operation, including configured peers, peer states, AS information, and received or accepted route counts. It is commonly used as a first troubleshooting command when checking BGP sessions. The <\/span>show ospf neighbor<\/span> command is specific to OSPF, while <\/span>show interfaces terse<\/span> summarizes interface status. A general route summary provides routing-table information rather than the detailed BGP peer summary needed to verify whether BGP sessions are established.<\/span><\/p>\nQuestion: 223. Which OSPF network type normally elects a DR and BDR?<\/b><\/p>\n\n- <\/b> Point-to-point<\/span>
\n<\/span>2.<\/b> Broadcast<\/span>
\n<\/span>3.<\/b> Loopback<\/span>
\n<\/span>4.<\/b> Virtual link<\/span><\/li>\n<\/ol>\nCorrect Answer:<\/b> 2. Broadcast<\/span><\/p>\nExplanation:<\/b><\/p>\n
OSPF normally elects a Designated Router (DR) and Backup Designated Router (BDR) on broadcast multiaccess networks such as Ethernet. The election helps reduce the number of full OSPF adjacencies and organizes LSA flooding across the shared segment. Point-to-point networks do not require DR or BDR elections because only two routers participate in the adjacency. Loopback interfaces represent logical interfaces rather than shared multiaccess OSPF segments. Virtual links provide logical connectivity between OSPF areas and are not themselves a normal broadcast network type requiring DR election.<\/span><\/p>\nQuestion: 224. What is the primary function of LACP when configuring an aggregated Ethernet interface?<\/b><\/p>\n\n- <\/b> Encrypt traffic between routers<\/span>
\n<\/span>2.<\/b> Exchange routing information between OSPF areas<\/span>
\n<\/span>3.<\/b> Assign addresses to IPv6 hosts<\/span>
\n<\/span>4.<\/b> Negotiate and maintain link aggregation between compatible devices<\/span><\/li>\n<\/ol>\nCorrect Answer:<\/b> 4. Negotiate and maintain link aggregation between compatible devices<\/span><\/p>\nExplanation:<\/b><\/p>\n
The Link Aggregation Control Protocol (LACP) dynamically negotiates and maintains a logical aggregated link composed of multiple physical Ethernet interfaces. Aggregation can increase available bandwidth and provide redundancy because traffic can use multiple physical links. LACP also helps ensure that participating interfaces are correctly associated with the aggregated interface. It does not perform IP encryption, OSPF inter-area routing, or IPv6 address assignment. On Junos devices, LACP is commonly used with aggregated Ethernet interfaces when multiple physical connections need to operate as a single logical link.<\/span><\/p>\nQuestion: 225. Which route is selected by longest-prefix matching when forwarding an IPv4 packet?<\/b><\/p>\n\n- <\/b> The route with the most specific matching prefix<\/span>
\n<\/span>2.<\/b> The route with the highest metric regardless of prefix length<\/span>
\n<\/span>3.<\/b> The route learned first<\/span>
\n<\/span>4.<\/b> The route with the shortest next-hop address<\/span><\/li>\n<\/ol>\nCorrect Answer:<\/b> 1. The route with the most specific matching prefix<\/span><\/p>\nExplanation:<\/b><\/p>\n
Longest-prefix matching selects the routing-table entry that matches the greatest number of leading destination-address bits. For example, if both 10.10.0.0\/16 and 10.10.20.0\/24 match a destination address, the \/24 route is more specific and is selected for forwarding. This process occurs before other route-selection considerations used to determine which routes are installed in the routing table. It is fundamental to IP forwarding because networks can contain both broad summary routes and more specific routes for individual subnets.<\/span><\/p>\nQuestion: 226. Which Junos routing instance type can be used to create an independent virtual routing table on the same device?<\/b><\/p>\n\n- <\/b> Virtual Router<\/span>
\n<\/span>2.<\/b> Firewall filter<\/span>
\n<\/span>3.<\/b> Forwarding class<\/span>
\n<\/span>4.<\/b> CoS scheduler<\/span><\/li>\n<\/ol>\nCorrect Answer:<\/b> 1. Virtual Router<\/span><\/p>\nExplanation:<\/b><\/p>\n
A Junos Virtual Router routing instance provides an independent routing environment on the same physical device. Each routing instance can maintain its own routing table and participate in routing protocols or static routing according to its configuration. This capability is useful when traffic from different networks needs to remain logically separated while sharing the same hardware. Firewall filters and forwarding classes serve different purposes related to packet filtering and traffic handling. A CoS scheduler controls traffic scheduling rather than creating an independent routing table.<\/span><\/p>\nQuestion: 227. Which OSPF packet is used to exchange summaries of the link-state database between neighbors?<\/b><\/p>\n\n- <\/b> Hello<\/span>
\n<\/span>2.<\/b> Link-State Request<\/span>
\n<\/span>3.<\/b> Database Description<\/span>
\n<\/span>4.<\/b> Link-State Acknowledgment<\/span><\/li>\n<\/ol>\nCorrect Answer:<\/b> 3. Database Description<\/span><\/p>\nExplanation:<\/b><\/p>\n
OSPF Database Description (DBD) packets are used during adjacency formation to exchange summaries of the link-state databases between neighboring routers. The summaries allow routers to determine which LSAs they already possess and which ones they need to request. Hello packets establish and maintain neighbor relationships, while Link-State Requests ask for specific LSAs. Link-State Acknowledgments confirm receipt of LSAs. Database Description packets therefore play a key role during the database synchronization process before an OSPF adjacency reaches the Full state.<\/span><\/p>\nQuestion: 228. Which BGP community attribute prevents a route from being advertised to any BGP peer?<\/b><\/p>\n\n- <\/b> no-export<\/span>
\n<\/span>2.<\/b> internet<\/span>
\n<\/span>3.<\/b> no-advertise<\/span>
\n<\/span>4.<\/b> local-AS<\/span><\/li>\n<\/ol>\nCorrect Answer:<\/b> 3. no-advertise<\/span><\/p>\nExplanation:<\/b><\/p>\n
The BGP <\/span>no-advertise<\/span> community tells a BGP speaker not to advertise the associated route to any BGP peer. This makes it more restrictive than <\/span>no-export<\/span>, which generally prevents advertisement outside the local autonomous system while still allowing appropriate internal propagation. The <\/span>internet<\/span> community indicates normal advertisement behavior, while <\/span>local-AS<\/span> has a different purpose associated with AS handling. Communities provide a flexible mechanism for applying routing policies to groups of routes without modifying each individual route attribute manually.<\/span><\/p>\nQuestion: 229. Which IPv4 address range is reserved for private networks?<\/b><\/p>\n\n- <\/b> 8.0.0.0\/8<\/span>
\n<\/span>2.<\/b> 172.16.0.0\/12<\/span>
\n<\/span>3.<\/b> 100.64.0.0\/10<\/span>
\n<\/span>4.<\/b> 224.0.0.0\/4<\/span><\/li>\n<\/ol>\nCorrect Answer:<\/b> 2. 172.16.0.0\/12<\/span><\/p>\nExplanation:<\/b><\/p>\n
The IPv4 range 172.16.0.0\/12 is one of the three RFC 1918 private address ranges. It covers addresses from 172.16.0.0 through 172.31.255.255 and is commonly used for internal networks that are not directly routable across the public Internet. The other RFC 1918 ranges are 10.0.0.0\/8 and 192.168.0.0\/16. The 224.0.0.0\/4 range is used for IPv4 multicast, while 100.64.0.0\/10 is designated for carrier-grade NAT address sharing rather than RFC 1918 private addressing.<\/span><\/p>\nQuestion: 230. Which OSPF LSA type describes the router’s links and interfaces within an area?<\/b><\/p>\n\n- <\/b> Type 5 AS External LSA<\/span>
\n<\/span>2.<\/b> Type 3 Summary LSA<\/span>
\n<\/span>3.<\/b> Type 2 Network LSA<\/span>
\n<\/span>4.<\/b> Type 1 Router LSA<\/span><\/li>\n<\/ol>\nCorrect Answer:<\/b> 4. Type 1 Router LSA<\/span><\/p>\nExplanation:<\/b><\/p>\n
A Type 1 Router LSA is originated by each OSPF router to describe its links, interfaces, and associated states within an area. The information is used by OSPF’s shortest-path calculation to construct the area’s topology. A Type 2 Network LSA is originated by the DR for an applicable multiaccess network, while Type 3 Summary LSAs are generated by ABRs to advertise inter-area networks. Type 5 LSAs describe external routes redistributed into OSPF. Router LSAs are therefore fundamental to calculating intra-area OSPF paths.<\/span><\/p>\nQuestion: 231. Which protocol is a link-state routing protocol that uses Level 1 and Level 2 routing domains?<\/b><\/p>\n\n- <\/b> RIP<\/span>
\n<\/span>2.<\/b> BGP<\/span>
\n<\/span>3.<\/b> IS-IS<\/span>
\n<\/span>4.<\/b> VRRP<\/span><\/li>\n<\/ol>\nCorrect Answer:<\/b> 3. IS-IS<\/span><\/p>\nExplanation:<\/b><\/p>\n
IS-IS is a link-state interior gateway protocol that organizes routing using Level 1 and Level 2 areas. Level 1 routers primarily maintain routing information within an area, while Level 2 routers provide connectivity between areas and can form the backbone of the IS-IS domain. RIP is a distance-vector protocol, BGP is an exterior gateway protocol, and VRRP provides first-hop redundancy rather than dynamic routing. Understanding IS-IS levels is important when analyzing how routes are propagated between different parts of an IS-IS network.<\/span><\/p>\nQuestion: 232. Which Junos command is most useful for verifying the hardware components installed in a router?<\/b><\/p>\n\n- <\/b> show chassis hardware<\/span>
\n<\/span>2.<\/b> show route<\/span>
\n<\/span>3.<\/b> show system alarms<\/span>
\n<\/span>4.<\/b> show configuration<\/span><\/li>\n<\/ol>\n