Juniper JN0-364\u00a0 Exam Dumps<\/b><\/a> and Practice Test Dumps<\/b><\/p>\nQuestion: 241. Which Junos command displays the forwarding table used to make packet-forwarding decisions?<\/b><\/p>\n\n- <\/b> show route forwarding-table<\/span>
\n<\/span>2.<\/b> show configuration<\/span>
\n<\/span>3.<\/b> show ospf neighbor<\/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 the forwarding table used by the device to make packet-forwarding decisions. The forwarding table is derived from routing information but is specifically concerned with how packets are forwarded toward their destinations. <\/span>show configuration<\/span> displays configuration data, <\/span>show ospf neighbor<\/span> displays OSPF neighbor relationships, and <\/span>show system uptime<\/span> reports system uptime. When troubleshooting forwarding behavior, examining the forwarding table can help determine whether the expected next hop and outgoing interface have been installed.<\/span><\/p>\nQuestion: 242. Which BGP attribute is commonly used to influence the preferred inbound path into an autonomous system?<\/b><\/p>\n\n- <\/b> Local Preference<\/span>
\n<\/span>2.<\/b> MED<\/span>
\n<\/span>3.<\/b> NEXT_HOP<\/span>
\n<\/span>4.<\/b> Origin<\/span><\/li>\n<\/ol>\nCorrect Answer:<\/b> 2. MED<\/span><\/p>\nExplanation:<\/b><\/p>\n
The Multi-Exit Discriminator (MED) is commonly used to provide a neighboring autonomous system with information about which entry point should be preferred when multiple connections exist between the two autonomous systems. Lower MED values are generally preferred when the attribute is compared. Local Preference is normally used inside an autonomous system to influence outbound traffic, while NEXT_HOP identifies the next-hop address and Origin indicates how the route entered BGP. MED therefore provides a mechanism for influencing the neighboring AS’s choice of inbound path.<\/span><\/p>\nQuestion: 243. 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 10<\/span>
\n<\/span>3.<\/b> Area 0<\/span>
\n<\/span>4.<\/b> Area 100<\/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 through which inter-area OSPF routing is normally organized. Area Border Routers connect other OSPF areas to the backbone and exchange summarized routing information between areas. A properly designed OSPF topology generally maintains connectivity between non-backbone areas and Area 0. Other area numbers can be used for regular OSPF areas, but Area 0 has a special architectural role. Understanding the backbone concept is important when troubleshooting inter-area route propagation.<\/span><\/p>\nQuestion: 244. Which Junos command displays detailed information about a particular routing-table prefix?<\/b><\/p>\n\n- <\/b> show route <prefix> detail<\/span>
\n<\/span>2.<\/b> show interfaces terse<\/span>
\n<\/span>3.<\/b> show chassis hardware<\/span>
\n<\/span>4.<\/b> show system alarms<\/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 protocol, the output can include the route’s protocol source, preference, next hop, interface, and other relevant attributes. This makes it particularly useful when troubleshooting why a route was selected or how traffic will be forwarded. The other commands serve different purposes: interface status, hardware inventory, and system alarm reporting. Focusing on one prefix is often more effective than reviewing the entire routing table during detailed route troubleshooting.<\/span><\/p>\nQuestion: 245. Which protocol uses a hop-count metric and has a maximum usable hop count of 15?<\/b><\/p>\n\n- <\/b> OSPF<\/span>
\n<\/span>2.<\/b> BGP<\/span>
\n<\/span>3.<\/b> IS-IS<\/span>
\n<\/span>4.<\/b> RIP<\/span><\/li>\n<\/ol>\nCorrect Answer:<\/b> 4. RIP<\/span><\/p>\nExplanation:<\/b><\/p>\n
Routing Information Protocol (RIP) uses hop count as its routing metric. A route with a hop count of 15 is considered reachable, while a hop count of 16 represents an unreachable destination in traditional RIP. This limitation makes RIP unsuitable for many large or complex networks. OSPF uses a cost metric, IS-IS uses link-state metrics, and BGP uses path attributes rather than a simple hop-count metric. RIP’s simplicity is useful for understanding distance-vector routing, although its scalability is limited compared with modern routing protocols.<\/span><\/p>\nQuestion: 246. Which OSPF LSA is originated by a Designated Router to represent a multiaccess network?<\/b><\/p>\n\n- <\/b> Type 5<\/span>
\n<\/span>2.<\/b> Type 2<\/span>
\n<\/span>3.<\/b> Type 3<\/span>
\n<\/span>4.<\/b> Type 1<\/span><\/li>\n<\/ol>\nCorrect Answer:<\/b> 2. Type 2<\/span><\/p>\nExplanation:<\/b><\/p>\n
An OSPF Type 2 Network LSA is originated by the Designated Router on applicable multiaccess networks. It represents the shared network segment and identifies the routers attached to that network. This allows OSPF’s link-state database to represent the multiaccess segment efficiently rather than requiring every router to describe every individual adjacency in the same manner. Type 1 Router LSAs describe individual routers, Type 3 Summary LSAs advertise inter-area networks, and Type 5 LSAs describe external routes. The Type 2 LSA is therefore closely associated with the DR function.<\/span><\/p>\nQuestion: 247. Which BGP attribute helps prevent routing loops between autonomous systems?<\/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 helps prevent routing loops by recording the autonomous systems through which a route advertisement has passed. When a BGP router receives an advertisement containing its own autonomous system number in the AS_PATH, it can reject the route because accepting it could create a routing loop. AS_PATH also contributes to BGP path selection, where a shorter path is generally preferred when earlier selection criteria do not determine a route. MED, Local Preference, and NEXT_HOP perform different functions and do not provide this same fundamental AS-level loop-prevention mechanism.<\/span><\/p>\nQuestion: 248. Which Junos command can be used to verify the device’s current uptime?<\/b><\/p>\n\n- <\/b> show system uptime<\/span>
\n<\/span>2.<\/b> show system alarms<\/span>
\n<\/span>3.<\/b> show route<\/span>
\n<\/span>4.<\/b> show bgp summary<\/span><\/li>\n<\/ol>\nCorrect Answer:<\/b> 1. <\/span>show system uptime<\/span><\/p>\nExplanation:<\/b><\/p>\n
The <\/span>show system uptime<\/span> command displays information about how long the Junos device has been running, along with related system uptime information. This is useful when investigating recent reboots, unexpected system restarts, or determining how long the current operating environment has been active. <\/span>show system alarms<\/span> is used for alarm information, <\/span>show route<\/span> displays routing information, and <\/span>show bgp summary<\/span> focuses on BGP peers and routing statistics. Uptime information can provide useful context during system troubleshooting and maintenance.<\/span><\/p>\nQuestion: 249. What is the primary purpose of a BGP route reflector?<\/b><\/p>\n\n- <\/b> To replace OSPF Area 0<\/span>
\n<\/span>2.<\/b> To eliminate the need for all iBGP peers to form a full mesh<\/span>
\n<\/span>3.<\/b> To provide first-hop gateway redundancy<\/span>
\n<\/span>4.<\/b> To aggregate physical Ethernet links<\/span><\/li>\n<\/ol>\nCorrect Answer:<\/b> 2. To eliminate the need for all iBGP peers to form a full mesh<\/span><\/p>\nExplanation:<\/b><\/p>\n
A BGP route reflector reduces the need for a full-mesh iBGP design. Without route reflection, iBGP speakers traditionally need direct sessions with other iBGP speakers to distribute routes throughout the autonomous system. A route reflector can receive routes from clients and reflect appropriate routes to other clients and peers. This simplifies BGP configuration and improves scalability in larger networks. Route reflectors do not replace OSPF’s backbone, provide gateway redundancy like VRRP, or aggregate Ethernet links like LACP.<\/span><\/p>\nQuestion: 250. Which IPv6 prefix identifies unique local unicast addresses?<\/b><\/p>\n\n- <\/b> FF00::\/8<\/span>
\n<\/span>2.<\/b> FE80::\/10<\/span>
\n<\/span>3.<\/b> FC00::\/7<\/span>
\n<\/span>4.<\/b> 2000::\/3<\/span><\/li>\n<\/ol>\nCorrect Answer:<\/b> 3. FC00::\/7<\/span><\/p>\nExplanation:<\/b><\/p>\n
The FC00::\/7 prefix is reserved for IPv6 Unique Local Addresses (ULAs). These addresses are intended for internal network use and are not designed for global Internet routing. They are conceptually similar to private IPv4 addressing, although their addressing model is different. FE80::\/10 is used for link-local addresses, FF00::\/8 is the IPv6 multicast range, and 2000::\/3 is commonly associated with globally routable unicast addresses. Recognizing these IPv6 address ranges is important when troubleshooting addressing and route propagation.<\/span><\/p>\nQuestion: 251. Which OSPF state indicates that a router has completed database synchronization with its neighbor?<\/b><\/p>\n\n- <\/b> Exchange<\/span>
\n<\/span>2.<\/b> Loading<\/span>
\n<\/span>3.<\/b> Full<\/span>
\n<\/span>4.<\/b> Init<\/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 the required link-state database synchronization. Once routers reach Full, they have exchanged the necessary LSAs and maintain synchronized databases for the applicable adjacency. The Exchange state involves exchanging Database Description information, while Loading involves requesting and receiving additional LSAs. Init occurs earlier, when a router has received a Hello but has not yet established two-way communication. A Full state is therefore an important indicator that an OSPF adjacency has successfully completed synchronization.<\/span><\/p>\nQuestion: 252. Which Junos feature allows multiple physical Ethernet interfaces to operate as one logical interface?<\/b><\/p>\n\n- <\/b> VRRP<\/span>
\n<\/span>2.<\/b> LACP<\/span>