JN0-351入門知識、JN0-351資格講座長年の努力と革新とクライアントベースのコンセプトを中心に、当社は業界の旗艦企業に成長しました。当社は、JN0-351試験の準備の質の向上に苦労し、JN0-351スタディガイドの研究と革新に多大な努力とお金を投資しています。業界での当社のブランド名は、優れたJN0-351学習ガイドで有名です。高品質、思いやりのあるサービス、絶え間ない革新、そしてJN0-351試験問題での最初の顧客の概念は、当社の4つの柱です。 Juniper Enterprise Routing and Switching, Specialist (JNCIS-ENT) 認定 JN0-351 試験問題 (Q49-Q54):質問 # 49
You want to ensure traffic is routed through a GRE tunnel.
In this scenario, which two statements will satisfy this requirement? (Choose two.)
A. Keepalives must be used on stateless tunneling protocols.
B. All intermediary devices must have a route to the tunnel endpoints.
C. Tunnel endpoints must have a route that directs traffic into the tunnel.
D. BFD must be used on the stateless tunneling protocols.
正解：B、C
解説：
Explanation
Option A is correct. For traffic to be sent through a GRE tunnel, there must be a route that directs the traffic into the tunnel. This is typically accomplished through the use of a static route or a dynamic routing protocol.
Option B is correct. All intermediary devices must have a route to the tunnel endpoints34. In real-world scenarios, the tunnel endpoints for a tunnel going over the Internet must have globally reachable internet addresses. Otherwise, intermediate routers in the Internet cannot forward the tunneled packets.
質問 # 50
Which statement concerning Bidirectional Forwarding Detection (BFD) is true for the configuration shown in the exhibit?
A. The link to neighbor 192.168.100.2 is not using BFD.
B. The effective interval for neighbor 192.168.100.2 is 500 ms.
C. The effective interval for neighbor 172.30.1.2 is 500 ms.
D. The minimum-interval must match on both ends.
正解：B
質問 # 51
In addition to the MAC addresses, what information is stored in the bridging table? (Choose two.)
A. ether type details
B. MAC learned time
C. preamble of Ethernet packet
D. interface details
正解：B、D
質問 # 52
Exhibit
You are troubleshooting an issue where traffic to 192.168.10.0/24 is being sent to R1 instead of your desired path through R2.
Referring to the exhibit, what is the reason for the problem?
A. R1's route is the best path due to a higher local preference
B. R2's route is not the best path due to loop prevention.
C. R2's route is not the best path due to a lower origin code.
D. R1's route is the best path due to the shorter AS path.
正解：A
解説：
The exhibit shows the output of the command show ip bgp, which displays information about the BGP routes in the routing table1. The output shows two routes for the destination 192.168.10.0/24, one from R1 and one from R2.
The route from R1 has a local preference of 200, while the route from R2 has a local preference of
100. Local preference is a BGP attribute that indicates the degree of preference for a route within an autonomous system (AS)2. A higher local preference means a more preferred route2.
BGP uses a best path selection algorithm to choose the best route for each destination among multiple paths. The algorithm compares different attributes of the routes in a specific order of precedence3. The first attribute that is compared is weight, which is a Cisco-specific attribute that is local to the router3. If the weight is equal or not set, the next attribute that is compared is local preference3.
In this case, both routes have the same weight of 0, which means that they are learned from external BGP (eBGP) peers3. Therefore, the next attribute that is compared is local preference. Since R1's route has a higher local preference than R2's route, it is chosen as the best path and installed in the routing table3. The other attributes, such as origin code and AS path, are not considered in this case.
質問 # 53
You have configured a GRE interface, but no traffic will flow.
Referring to the exhibit, which statement is true?
A. The IP subnet mask cannot be a /32.
B. The source and destination addresses cannot have the same third octet.
C. The gr-1/2/0 interface is an invalid GRE interface.
