Juniper Juniper Certifications JN0-347 Questions & Answers

• Question 101:

  What types of authentication are supported in Junos for OSPF?

  A. Simple password

  B. MD5 checksum

  C. Hitless key chain of MD5 keys/checksums

  D. All of the above

  Correct Answer: D

• Question 102:

  Click the Exhibit button. In the exhibit, each IP subnet in the network is associated with a unique VLAN ID. Which action will ensure that Host C will communicate with Host A and Host B?

  

  A. Configure all switch ports connecting to the host devices as access ports associated with a common VLAN.

  B. Configure an IRB interface for each VLAN and associate it with its corresponding VLAN.

  C. Configure all switch ports connecting to the host devices as trunk ports associated with all VLANs.

  D. Configure a port-based ACL that permits inter-VLAN routing for all configured VLANs.

  Correct Answer: B

  Configuring Routing Between VLANs on One Switch To segment traffic on a LAN into separate broadcast domains, you create separate virtual LANs (VLANs). Of course, you also want to allow these employees to communicate with people and resources in other VLANs. To forward packets between VLANs you normally you need a router that connects the VLANs. However, you can accomplish this on a Juniper Networks switch without using a router by configuring an integrated routing and bridging (IRB) interface (also known as a routed VLAN interface-- or RVI-- in versions of Junos OS that do not support Enhanced Layer 2 Software).

• Question 103:

  Which protocol prevents loops and calculates the best path through a switched network that contains redundant paths?

  A. VRRP

  B. STP

  C. DHCP

  D. IS-IS

  Correct Answer: B

  Spanning Tree Protocol (STP) is a Layer 2protocol that runs on bridges and switches. The main purpose of STP is to ensure that you do not create loops when you have redundant paths in your network

• Question 104:

  Which LSA type describes the router ID of ASBR routers located in remote areas?

  A. Type 4

  B. Type 5

  C. Type 3

  D. Type 7

  Correct Answer: A

• Question 105:

  Click the Exhibit button.

  

  What will be two results of the OSPF configuration shown in the exhibit? (Choose two.)

  A. A default route will be advertised into Area 1 as a Type 7 LSA.

  B. Area 0 will not generate summary LSAs for networks in Area 1.

  C. There will be no Type 3 LSAs in Area 1.

  D. Only Type 7 LSAs will be present in Area 1.

  Correct Answer: AB

• Question 106:

  What are three types of port designation specific to Private VLANs? (Choose three.)

  A. Promiscuous ports

  B. Transparent ports

  C. PVLAN trunk ports

  D. Designated ports

  E. Isolated ports

  Correct Answer: ACE

• Question 107:

  Click the Exhibit button. Based on the output shown in the exhibit, which statement is correct?

  

  A. The ge-0/0/9 interface is using the default priority value.

  B. The ge-0/0/15 interface is using the default port cost.

  C. This switch has a bridge priority k.

  D. This switch has been elected as the root bridge.

  Correct Answer: B

  The default port cost for a 100 Mbit/s interface is 200,000, which is the port cost of the ge-0/0/15 interface. Note: Data rate and default STP path cost

  

• Question 108:

  Which two statements are correct regarding the root bridge election process when using STP? (Choose two.)

  A. A higher system MAC address is preferred.

  B. A higher bridge priority is preferred.

  C. A lower system MAC address is preferred.

  D. A lower bridge priority is preferred.

  Correct Answer: CD

  The root bridge for each spanning-tree protocol (STP) instance is determined by the bridge ID. The bridge ID consists of a configurable bridge priority and the MAC address of the bridge. The bridge with the lowest bridge ID is elected as the root bridge. If the bridge priorities are equal or if the bridge priority is not configured, the bridge with the lowest MAC address is elected the root bridge.

• Question 109:

  Which two statements are true about nonstop bridging (NSB)? (Choose two.)

  A. NSB does not require all participating Routing Engines to run the same version of the Junos OS.

  B. NSB can be enabled under the protocols layer2-control hierarchy.

  C. NSB requires you to configure graceful Routing Engine switchover (GRES).

  D. NSB does not require you to configure graceful Routing Engine switchover (GRES).

  Correct Answer: BC

• Question 110:

  Click to the Exhibit button. Referring to the exhibit, which router will become the BDR if all routers are powered on at the same time?

  

  A. R3

  B. R2

  C. R1

  D. R4

  Correct Answer: A

  In LANs, the election of the designated router takes place when the OSPF network is initially established. When the first OSPF links are active, the routing device with the highest router identifier (defined by the router-id configuration value, which is typically the IP address of the routing device, or the loopback address) is elected the designated router. The routing device with the second highest router identifier is elected the backup designated router.