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JN0-347 Real Exam Questions

Enterprise Routing and Switching, Specialist (JNCIS-ENT)

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Question 1 Multiple choice

Which three BGP attributes are well-known and mandatory? (Choose three.)

  1. A

    AS Path

  2. B

    Next Hop

  3. C

    MED

  4. D

    Local Preference

  5. E

    Origin

Show answer and explanation

Correct answers: A, B, E

Question 2 Single choice

You configured a GRE tunnel that traverses a path using default MTU settings. You want t o ensure that packets are not dropped or fragmented.
In this scenario, what is the maximum packet size that would traverse the GRE tunnel?

  1. A

    1476

  2. B

    1500

  3. C

    1400

  4. D

    1524

Show answer and explanation

Correct answer: A

Explanation

The default Ethernet MTU is 1500. There is a 24 byte GRE overhead, so there remain 1476 bytes for the data packet.

Question 3 Single choice

Which state indicates that the BGP session is fully converged?

  1. A

    Connect

  2. B

    Up

  3. C

    Established

  4. D

    Active

Show answer and explanation

Correct answer: C

Explanation

In order to make decisions in its operations with peers, a BGP peer uses a simple finite state machine (FSM) that consists of six states: Idle; Connect; Active; OpenSent; OpenConfirm; and Established. In the
Established state, the peers send Update messages to exchange information about each route being advertised to the BGP peer.

Question 4 Single choice

What types of authentication are supported in Junos for OSPF?

  1. A

    Simple password

  2. B

    MD5 checksum

  3. C

    Hitless key chain of MD5 keys/checksums

  4. D

    All of the above

Show answer and explanation

Correct answer: D

Question 5 Single choice

Click the Exhibit button.
Based on the trace options output shown in the exhibit, what is the problem with the adjacency?

  1. A

    connectivity

  2. B

    authentication mismatch

  3. C

    area mismatch

  4. D

    MTU mismatch

Show answer and explanation

Correct answer: C

Explanation

From the exhibit we see: OSPF packet ignored: area mismatch

Question 6 Single choice

Click the Exhibit button.
Referring to the exhibit, which type of route is displayed?

  1. A

    generate.

  2. B

    martian

  3. C

    aggregate

  4. D

    static

Show answer and explanation

Correct answer: C

Explanation

From the exhibit se see: Contributing Routes Note: Route aggregation allows you to combine groups of routes with common addresses into a single entry in the routing table.
This decreases the size of the routing table as well as the number of route advertisements sent by the routing device. An aggregate route becomes active when it has one or more contributing routes. A contributing route is an active route that isa more specific match for the aggregate destination.

Question 7 Single choice

Click the Exhibit button.

You manage the Layer 2 network shown in the exhibit. You experience a failure on the ge-0/0/0 link between Switch-1 and Switch-2.

Which statement is correct about the expected behavior?

  1. A

    Switch-3's ge-0/0/2 port role and state will transition to designated and forwarding.

  2. B

    Switch-3's ge-0/0/2 port role and state will remain as alternate and discarding.

  3. C

    Switch-3 will become the root bridge for the RSTP topology.

  4. D

    Switch-3 will remove the ge-0/0/2 interface from the RSTP topology.

Show answer and explanation

Correct answer: A

Question 8 Single choice

You are adding a new EX4300 member switch to your existing EX4300 Virtual Chassis. However, the new member is not running the same Junos version as the other members.
By default, what is the expected behavior?

  1. A

    The new switch is not recognized by the Virtual Chassis.

  2. B

    The Virtual Chassis will transition into a split brain situation between the existing master Routing Engine and the switch running the different version.

  3. C

    The new switch will be assigned a member ID and then placed in an inactive state.

  4. D

    The new switch will automatically pull the correct version from the master Routing Engine and perform the necessary upgrade.

Show answer and explanation

Correct answer: D

Question 9 Single choice

You have deployed a Juniper EX Series switch in the network. The switch receives a broadcast frame on an interface.

Which statement describes the behavior of the switch?

  1. A

    The frame is flooded out all ports that are part of the same VLAN as the receiving port, except for the port on which the frame was received.

  2. B

    The frame is flooded out all ports in all VLANs configured on the switch.

  3. C

    The frame is re-transmitted as a multicast frame on all ports on the switch.

  4. D

    The frame is flooded out all ports that are part of the same VLAN as the receiving port, including the port on which the frame was received.

Show answer and explanation

Correct answer: A

Question 10 Multiple choice

Depending on the link type, OSPF sends link state update packets to which two addresses? (Choose two.)

  1. A

    224.0.0.8

  2. B

    224.0.0.6

  3. C

    224.0.0.9

  4. D

    224.0.0.5

Show answer and explanation

Correct answers: B, D

Explanation

Every time a router sends an update, it sends it to the DR and BDR on the multicast address 224.0.0.6.
The DR will then send the update out to all other routers in the area, to the multicast address 224.0.0.5.