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Juniper JN0-351 Practice Test - Questions Answers, Page 2

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Question 11

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Which statement is correct about IP-IP tunnels?

IP-IP tunnels only support encapsulating IP traffic.
IP-IP tunnels only support encapsulating IP traffic.
IP-IP tunnels only support encapsulating non-IP traffic.
IP-IP tunnels only support encapsulating non-IP traffic.
The TTL in the inner packet is decremented during transit to the tunnel endpoint.
The TTL in the inner packet is decremented during transit to the tunnel endpoint.
There are 24 bytes of overhead with IP-IP encapsulation.
There are 24 bytes of overhead with IP-IP encapsulation.
Suggested answer: A
Explanation:

IP-IP tunnels are a type of tunnels that use IP as both the encapsulating and encapsulated protocol. IP-IP tunnels are simple and easy to configure, but they do not provide any security or authentication features. IP-IP tunnels only support encapsulating IP traffic, which means that the payload of the inner packet must be an IP packet.IP-IP tunnels cannot encapsulate non-IP traffic, such as Ethernet frames or MPLS labels1.

Option A is correct, because IP-IP tunnels only support encapsulating IP traffic. Option B is incorrect, because IP-IP tunnels only support encapsulating non-IP traffic. Option C is incorrect, because the TTL in the inner packet is not decremented during transit to the tunnel endpoint.The TTL in the outer packet is decremented by each router along the path, but the TTL in the inner packet is preserved until it reaches the tunnel endpoint2. Option D is incorrect, because there are 20 bytes of overhead with IP-IP encapsulation.The overhead consists of the header of the outer packet, which has a fixed size of 20 bytes for IPv43.

1:IP-IP Tunneling2:What is tunneling? | Tunneling in networking3: IPv4 - Header

asked 18/09/2024
Felipe Santos Cardoso
36 questions

Question 12

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You are configuring an IS-IS IGP network and do not see the IS-IS adjacencies established. In this scenario, what are two reasons for this problem? (Choose two.)

MTU is not at least 1492 bytes.
MTU is not at least 1492 bytes.
IP subnets are not a /30 address.
IP subnets are not a /30 address.
The Level 2 routers have mismatched areas.
The Level 2 routers have mismatched areas.
The lo0 interface is not included as an IS-IS interface.
The lo0 interface is not included as an IS-IS interface.
Suggested answer: A, D
Explanation:

Option A suggests that the MTU is not at least 1492 bytes.This is correct because IS-IS requires a minimum MTU of 1492 bytes to establish adjacencies1.If the MTU is less than this, IS-IS adjacencies will not be established1.

Option D suggests that the lo0 interface is not included as an IS-IS interface.This is also correct because the loopback interface (lo0) is typically used as the router ID in IS-IS1.If the loopback interface is not included in IS-IS, it could prevent IS-IS adjacencies from being established1.

Therefore, options A and D are correct.

asked 18/09/2024
Chris OMalley
32 questions

Question 13

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You are asked to create a new firewall filter to evaluate Layer 3 traffic that is being sent between VLANs. In this scenario, which two statements are correct? (Choose two.)

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Question 14

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Exhibit

Juniper JN0-351 image Question 14 50610 09182024211207000000

You have configured a GRE tunnel. To reduce the risk of dropping traffic, you have configured a keepalive OAM probe to monitor the state of the tunnel; however, traffic drops are still occurring.

Referring to the exhibit, what is the problem?

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Question 15

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Exhibit

Juniper JN0-351 image Question 15 50611 09182024211207000000

You are a network operator troubleshooting BGP connectivity.

Which two statements are correct about the output shown in the exhibit? (Choose two.)

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Question 16

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What is the maximum allowable MTU size for a default GRE tunnel without IPv4 traffic fragmentation?

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Question 17

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You are a network operator who wants to add a second ISP connection and remove the default route to the existing ISP You decide to deploy the BGP protocol in the network.

What two statements are correct in this scenario? (Choose two.)

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Question 18

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You are troubleshooting a BGP routing issue between your network and a customer router and are reviewing the BGP routing policies. Which two statements are correct in this scenario? (Choose two.)

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Question 19

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You are asked to connect an IP phone and a user computer using the same interface on an EX Series switch. The traffic from the computer does not use a VLAN tag, whereas the traffic from the IP phone uses a VLAN tag.

Which feature enables the interface to receive both types of traffic?

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Question 20

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Exhibit

Juniper JN0-351 image Question 20 50616 09182024211207000000

Which command displays the output shown in the exhibit?

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