Juniper Juniper Certifications JN0-361 Questions & Answers

• Question 81:

  The gr-0/0/0.0 interface on your Junos device has a link state of up/up and you have correctly added static routes to reach the remote subnets. However, you are not seeing traffic pass over the tunnel. What might be causing the issue?

  A. The tunnel interfaces are disabled

  B. You have not configured keepalives on the endpoints

  C. The endpoints do not have valid routes to the remote tunnel endpoints

  D. The intermediary devices do not have valid routes to the route tunnel endpoints

  Correct Answer: D

  For proper tunnel operation, the intermediary devices, located in the forwarding path between the tunnel endpoints, must be able to route to each of the tunnel endpoints.

• Question 82:

  Which routing table is used to store known IPv6 routes?

  A. inet0

  B. inet.6

  C. inet6.0

  D. inet.2

  Correct Answer: C

  IPv6 routes are stored in the inet6.0 routing table on Junos devices.

• Question 83:

  Which three statements are true about tunneling IPv6 traffic over IPv4 networks? (Choose three.)

  A. The source tunnel endpoint encapsulates the native IPv6 packet inside IPv4

  B. The source tunnel endpoint disassembles the IPv6 packet and reassembles it as IPv4

  C. The intermediary hops are responsible for de-encapsulating and re-encapsulating the IPv4 packet to process the IPv6 payload

  D. The source tunnel endpoint forwards the IPv4 network with the encapsulated IPv6 payload through the IPv4 network

  E. The destination tunnel endpoint de-encapsulates the IPv6 packet and forwards/processes the packet natively

  Correct Answer: ADE

  Tunneling requires encapsulation of the IPv6 packet within an IPv4 header. The new IPv4 packet is then forwarded across the IPv4 network to the other end of the tunnel, where the IPv4 header is removed and the IPv6 packet is either processed or forwarded.

• Question 84:

  As frames are processed by a switch, which statement is true about how the switch builds its MAC table?

  A. The source addresses fo the frames are associated with the inbound interface

  B. The source addresses fo the frames are associated with the outbound interface

  C. The destination addresses fo the frames are associated with the inbound interface

  D. The destination addresses fo the frames are associated with the outbound interface

  Correct Answer: A

  The initial function a bridge performs when it receives a frame is to update the bridge table with the source MAC address and the port it came in on if the MAC address was not previously known.

• Question 85:

  What are two port modes for a Layer 2 interface? (Choose two.)

  A. access mode

  B. dual mode

  C. trunk mode

  D. tag mod

  Correct Answer: AC

  Access ports typically connect to end systems such as PCs and printers, while trunk ports typically connect to other switches and are used to carry multiple VLANs.

• Question 86:

  Which command is used to configure an IRB interface?

  A. set family inet interface irb unit 0 address 192.168.1.1/24

  B. set interface irb unit 0 family inet address 192.168.1.1/24

  C. set interface unit 0 family irb address 192.168.1.1/24

  D. set bridge-domain 0 interface irb address 192.168.1.1/24

  Correct Answer: B

  An IRB interface is configured similar to a physical Layer 3 interface, by specifying an interface type irb, a logical unit, a protocol family, and an IP address (using CIDR notation).

• Question 87:

  What are three functions of a provider edge bridge when implementing provider bridging? (Choose three.)

  A. to forward frames based only on the S-VLAN tag

  B. to encapsulate customer frames and append a C-VLAN tag

  C. to forward IEEE 802.1Q frames to customers

  D. to encapsulate customer frames using the IEEE 802.1ad format

  E. to forward customer frames across a provider bridged network

  Correct Answer: CDE

  A provider network can provide Layer 2 forwarding services for customers wishing to connect their remote sites together. The provider uses 802.1ad double-tagged (S-tag, C-tag) frames across their network and delivers the 802.1Q frames to the customer network at the remote end.

• Question 88:

  Which configuration correctly enables an IRB interface on an MX Series device?

  A. [edit] user@switch# show bridge-domains vlan-222 vlan-id 222; layer3-interface irb.0; }

  B. [edit] user@switch# show bridge-domains vlan-222 vlan-id 222; layer3-interface lt.0; }

  C. [edit] user@switch# show bridge-domains vlan-222 vlan-id 222; routing-interface lt.0; }

  D. [edit] user@switch# show bridge-domains vlan-222 vlan-id 222; routing-interface irb.0; }

  Correct Answer: D

  The following configuration (show above in xml format) is the correct answer as it correctly includes the routing-interface irb:

  set bridge-domains vlan-222 vlan-id 222 set bridge-domains vlan-222 routing-interface irb.0

• Question 89:

  Where would you configure MVRP in a multiswitch environment?

  A. on all interfaces

  B. on access ports

  C. on trunk ports

  D. within the bridge domain

  Correct Answer: C

  The implementation of MVRP, which is used to dynamically learn and delete VLANs, is configured at the [edit protocols mvrp] hierarchy level. Only trunk points should be included; access ports are configured normally.

• Question 90:

  Which command is used to display the Layer 2 forwarding table on an MX Series device?

  A. show bridge-switching table

  B. show ethernet-switching table

  C. show bridge-mac table

  D. show bridge table

  Correct Answer: C

  On an MX Series device, the command to display the forwarding table is show bridge-mac table.