Juniper JN0-364\u00a0 Exam Dumps<\/b><\/a> and Practice Test Dumps<\/b><\/p>\nQuestion: 201. Which Junos command displays the routing table entries learned through OSPF?<\/b><\/p>\n\n- <\/b> show route protocol ospf<\/span>
\n<\/span>2.<\/b> show ospf database<\/span>
\n<\/span>3.<\/b> show route protocol bgp<\/span>
\n<\/span>4.<\/b> show interfaces terse<\/span><\/li>\n<\/ol>\nCorrect Answer:<\/b> 1. <\/span>show route protocol ospf<\/span><\/p>\nExplanation:<\/b><\/p>\n
The <\/span>show route protocol ospf<\/span> command filters the Junos routing table to display routes whose protocol source is OSPF. This is useful when troubleshooting whether OSPF-learned routes have successfully entered the routing table. <\/span>show ospf database<\/span> instead displays the OSPF link-state database, while <\/span>show route protocol bgp<\/span> filters for BGP routes. <\/span>show interfaces terse<\/span> provides interface status and addressing information rather than routing information. Filtering the routing table by protocol is particularly useful when verifying route installation after establishing OSPF neighbor relationships.<\/span><\/p>\nQuestion: 202. In BGP, which attribute is commonly used within an autonomous system to select 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> Origin<\/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 should be preferred for outbound traffic. A higher Local Preference value is preferred. Because the attribute is propagated through iBGP, it can influence routing decisions across the autonomous system. MED, by contrast, is primarily used to provide information about preferred entry points into an AS from neighboring networks. AS_PATH records autonomous systems traversed and also participates in path selection and loop prevention. The Origin attribute identifies how a route entered BGP and has a lower role in this particular decision.<\/span><\/p>\nQuestion: 203. Which OSPF packet type is used to request specific link-state information from a neighbor?<\/b><\/p>\n\n- <\/b> Link-State Update<\/span>
\n<\/span>2.<\/b> Database Description<\/span>
\n<\/span>3.<\/b> Link-State Request<\/span>
\n<\/span>4.<\/b> Link-State Acknowledgment<\/span><\/li>\n<\/ol>\nCorrect Answer:<\/b> 3. Link-State Request<\/span><\/p>\nExplanation:<\/b><\/p>\n
An OSPF Link-State Request, or LSR, is used by a router to request specific link-state advertisements from an OSPF neighbor. During database synchronization, routers use Database Description packets to exchange summaries of their LSDB contents. If a router determines that it needs more detailed information, it sends an LSR. The neighbor responds with a Link-State Update containing the requested LSAs. Link-State Acknowledgment packets are used to acknowledge receipt of LSAs. These packet types work together to maintain synchronized OSPF link-state databases.<\/span><\/p>\nQuestion: 204. What is the primary purpose of BFD on a Junos device?<\/b><\/p>\n\n- <\/b> To assign IPv6 addresses automatically<\/span>
\n<\/span>2.<\/b> To provide rapid detection of forwarding-path failures<\/span>
\n<\/span>3.<\/b> To select the BGP origin attribute<\/span>
\n<\/span>4.<\/b> To create an OSPF area hierarchy<\/span><\/li>\n<\/ol>\nCorrect Answer:<\/b> 2. To provide rapid detection of forwarding-path failures<\/span><\/p>\nExplanation:<\/b><\/p>\n
Bidirectional Forwarding Detection (BFD) provides rapid detection of failures in forwarding paths between network devices. It operates independently of many routing protocols and can notify a protocol such as OSPF or BGP when a forwarding path becomes unavailable. This allows routing protocols to react much faster than they might using their normal protocol timers. BFD does not assign IPv6 addresses, determine BGP Origin values, or create OSPF areas. On Junos devices, BFD is particularly useful where fast failure detection is required for routing adjacencies.<\/span><\/p>\nQuestion: 205. Which IPv6 prefix is reserved for link-local unicast addresses?<\/b><\/p>\n\n- <\/b> FC00::\/7<\/span>
\n<\/span>2.<\/b> 2000::\/3<\/span>
\n<\/span>3.<\/b> FF00::\/8<\/span>
\n<\/span>4.<\/b> FE80::\/10<\/span><\/li>\n<\/ol>\nCorrect Answer:<\/b> 4. FE80::\/10<\/span><\/p>\nExplanation:<\/b><\/p>\n
The IPv6 prefix FE80::\/10 is reserved for link-local unicast addresses. Link-local addresses are automatically associated with IPv6-enabled interfaces and are valid only on the local Layer 2 link. They are commonly used for neighbor discovery and routing protocol communication. FC00::\/7 is reserved for unique local addresses, while FF00::\/8 represents IPv6 multicast addresses. The 2000::\/3 range is associated with globally routable unicast IPv6 addresses. Link-local addressing is therefore an essential part of normal IPv6 operation.<\/span><\/p>\nQuestion: 206. Which BGP attribute contains the sequence of autonomous systems through which a route has passed?<\/b><\/p>\n\n- <\/b> Local Preference<\/span>
\n<\/span>2.<\/b> AS_PATH<\/span>
\n<\/span>3.<\/b> MED<\/span>
\n<\/span>4.<\/b> NEXT_HOP<\/span><\/li>\n<\/ol>\nCorrect Answer:<\/b> 2. AS_PATH<\/span><\/p>\nExplanation:<\/b><\/p>\n
The BGP AS_PATH attribute records the autonomous systems that a route advertisement has traversed. It serves two important purposes: it provides information used in BGP path selection, and it helps prevent routing loops. When an eBGP router advertises a route to another autonomous system, it normally adds its own AS number to the AS_PATH. If a router receives a route containing its own AS number, it can reject the route as a potential loop. Local Preference influences outbound path selection, MED can influence inbound path selection, and NEXT_HOP identifies the next-hop address.<\/span><\/p>\nQuestion: 207. Which Junos command provides a concise summary of interface administrative and operational status?<\/b><\/p>\n\n- <\/b> show interfaces terse<\/span>
\n<\/span>2.<\/b> show route<\/span>
\n<\/span>3.<\/b> show system alarms<\/span>
\n<\/span>4.<\/b> show chassis hardware<\/span><\/li>\n<\/ol>\nCorrect Answer:<\/b> 1. <\/span>show interfaces terse<\/span><\/p>\nExplanation:<\/b><\/p>\n
The <\/span>show interfaces terse<\/span> command provides a compact overview of interfaces, including their administrative and operational status and configured addressing information. It is particularly useful when quickly checking whether interfaces are up or down without displaying the extensive details produced by <\/span>show interfaces<\/span>. <\/span>show route<\/span> displays routing information, <\/span>show system alarms<\/span> reports system alarms, and <\/span>show chassis hardware<\/span> displays hardware inventory. Network administrators commonly use the terse interface command as an initial troubleshooting step before examining detailed interface statistics.<\/span><\/p>\nQuestion: 208. Which OSPF neighbor state indicates that the routers have fully synchronized their link-state databases?<\/b><\/p>\n\n- <\/b> Init<\/span>
\n<\/span>2.<\/b> Exchange<\/span>
\n<\/span>3.<\/b> Full<\/span>
\n<\/span>4.<\/b> Attempt<\/span><\/li>\n<\/ol>\nCorrect Answer:<\/b> 3. Full<\/span><\/p>\nExplanation:<\/b><\/p>\n
The OSPF Full state indicates that neighboring routers have completed database synchronization. In this state, the routers have exchanged the necessary link-state information and have synchronized their link-state databases. Other OSPF states occur earlier in the neighbor formation process. Init indicates that a Hello has been received but two-way communication has not yet been established, while Exchange involves database description exchange. Attempt is associated with specific nonbroadcast network behavior. A stable Full adjacency is therefore an important indication that OSPF neighbors have successfully synchronized their routing information.<\/span><\/p>\nQuestion: 209. Which BGP community prevents a route from being advertised outside the local autonomous system?<\/b><\/p>\n\n- <\/b> no-advertise<\/span>
\n<\/span>2.<\/b> no-export<\/span>
\n<\/span>3.<\/b> internet<\/span>
\n<\/span>4.<\/b> local-AS<\/span><\/li>\n<\/ol>\nCorrect Answer:<\/b> 2. no-export<\/span><\/p>\nExplanation:<\/b><\/p>\n
The BGP <\/span>no-export<\/span> community instructs BGP speakers not to advertise a route to an eBGP peer outside the local autonomous system. The route can still be distributed within the autonomous system through appropriate iBGP behavior. The <\/span>no-advertise<\/span> community is more restrictive because it prevents the route from being advertised to any BGP peer. The <\/span>internet<\/span> community has the opposite general meaning and allows normal advertisement. Understanding BGP communities is important when controlling how routes propagate between autonomous systems and preventing unintended external route advertisements.<\/span><\/p>\nQuestion: 210. Which routing protocol uses TCP port 179 for its transport connection?<\/b><\/p>\n\n- <\/b> OSPF<\/span>
\n<\/span>2.<\/b> IS-IS<\/span>
\n<\/span>3.<\/b> RIP<\/span>
\n<\/span>4.<\/b> BGP<\/span><\/li>\n<\/ol>\nCorrect Answer:<\/b> 4. BGP<\/span><\/p>\nExplanation:<\/b><\/p>\n
BGP uses TCP port 179 to establish its reliable transport connection between BGP peers. TCP provides reliable, ordered delivery for BGP messages, which include OPEN, UPDATE, KEEPALIVE, and NOTIFICATION messages. OSPF does not use TCP or UDP because it operates directly over IP using its own protocol number. RIP uses UDP, traditionally on port 520 for IPv4, while IS-IS operates directly at the data-link layer rather than using TCP. Knowing BGP’s TCP transport behavior is fundamental when troubleshooting peer establishment and connectivity.<\/span><\/p>\nQuestion: 211. What does the Junos <\/b>commit check<\/b> command do?<\/b><\/p>\n\n- <\/b> Activates the configuration and reboots the device<\/span>
\n<\/span>2.<\/b> Validates the candidate configuration without activating it<\/span>
\n<\/span>3.<\/b> Deletes the candidate configuration<\/span>
\n<\/span>4.<\/b> Displays the forwarding table<\/span><\/li>\n<\/ol>\nCorrect Answer:<\/b> 2. Validates the candidate configuration without activating it<\/span><\/p>\nExplanation:<\/b><\/p>\n
The Junos <\/span>commit check<\/span> command validates the candidate configuration for syntax and configuration consistency without actually activating the changes. It is useful before a real commit because it can identify configuration problems while leaving the active configuration unchanged. A normal <\/span>commit<\/span>