Enterprise Routing and Switching, Specialist (JNCIS-ENT) v1.0
Question 1
A BGP router initializes and begins its neighbor state progression. The router has not yet attempted to form a TCP session with its peer.
In this scenario, the router is in which BGP neighbor state?
- A. Connect state
- B. OpenSent state
- C. Idle state
- D. Active state
Answer : C
Question 2
You have configured a static route and want to prevent the route from being learned by OSPF.
Which parameter in your configuration should you use in this scenario?
- A. metric
- B. preference
- C. as-path
- D. no-readvertise
Answer : D
Question 3
You are asked to monitor the Virtual Router Redundancy Protocol (VRRP) virtual address using ping commands. You have set up your monitoring solution to ping the virtual IP (VIP) but have not yet received a response. The network is functioning correctly.
In this scenario, which command should you add to your VRRP configuration to allow ping replies?
- A. accept-data
- B. no-preempt
- C. authentication-key
- D. track
Answer : A
Question 4
Click the Exhibit button.
Referring to the exhibit, which statement describes how the two DROther routers should exchange LSAs on this segment?
- A. They should rely on the DR to distribute network LSAs for the segment.
- B. They should suppress Type 1 LSAs because only the DR originates LSAs on multi-access networks.
- C. They should send all Type 1 LSAs only to the BDR for retransmission.
- D. They should exchange LSAs directly with each other using unicast.
Answer : A
Question 5
A non-root bridge switch experiences a failure on its root port. A second interface connected to the same upstream switch immediately moves from discarding to forwarding without waiting for the timer expiration. The link is full-duplex.
In this scenario, which port role was assigned to the second interface before the failure?
- A. disabled port
- B. backup port
- C. alternate port
- D. designated port
Answer : C
Question 6
You examine a packet flow where Switch-1 receives an untagged frame on an access port in VLAN 10, forwards it across a trunk, and Switch-2 forwards the frame out another access port.
Which two actions occur during this process? (Choose two.)
- A. Switch-2 forwards the tagged frame out the access port without modification.
- B. Switch-1 adds VLAN tag 10 before sending the frame over the trunk.
- C. Switch-1 forwards the frame untagged across the trunk.
- D. Switch-2 removes VLAN tag 10 before transmitting the frame out the access port.
Answer : BD
Question 7
Which statement describes the purpose of nonstop bridging (NSB) on Juniper Networks EX Series Switches?
- A. NSB limits the maximum MAC learning rate to prevent table overflow during failover.
- B. NSB maintains Layer 2 forwarding during a Routing Engine switchover by synchronizing bridge table information.
- C. NSB rewrites spanning-tree BPDUs to maintain designated-port priority during failover.
- D. NSB provides nonstop routing failover by mirroring the routing protocol state to the backup Routing Engine.
Answer : B
Question 8
Which two statements describe generated routes? (Choose two.)
- A. Generated routes inherit the next-hop of the primary contributing route
- B. Generated routes have a default next-hop of reject
- C. Generated routes do not require a routing policy to match contributing routes
- D. Generated routes can be used as a route of last resort if they have at least one contributing route
Answer : AD
Question 9
A Juniper switch receives a unicast frame.
In this scenario, what is the first step to determine the destination port?
- A. The switch performs an ARP request to discover the MAC address of the destination host.
- B. The frame is flooded out all ports configured for the same VLAN.
- C. The switch performs a lookup to determine the egress port based on the destination MAC address.
- D. The frame is flooded out all ports configured on the switch.
Answer : C
Question 10
When configuring Bidirectional Forwarding Detection (BFD) in Junos OS, which statement is correct?
- A. BFD is enabled for static routing by default.
- B. BFD can be configured for OSPF, BGP, or IS-IS.
- C. BFD cannot be used with logical interfaces (units) and only operates on physical interfaces.
- D. BFD is only supported when using BGP.
Answer : B
Question 11
You are configuring IS-IS on your network. The network design calls for metrics to be configured based on role. WAN links have a metric of 100 and LAN links have a metric of 10.
Which statement is correct in this scenario?
- A. Configuring WAN interfaces as level 2 interfaces ensures that the metrics are advertised correctly.
- B. Configuring LAN interfaces as level 1 interfaces ensures that the metrics are advertised correctly.
- C. Configuring the wide-metrics-only option under the appropriate level ensures that metrics are advertised correctly.
- D. Configuring LAN interfaces with metric 10 ensures that the metrics are advertised correctly.
Answer : C
Question 12
Click the Exhibit button.
You are asked to create a static backup default route that will be used only if the primary static default route is unavailable.
Referring to the exhibit, what are two ways to accomplish this task? (Choose two.)
-
A.
-
B.
-
C.
-
D.
Answer : AC
Question 13
You are troubleshooting a Layer 2 topology issue in a campus network. The switches are running RSTP. You need to verify which switch is currently acting as the root bridge and identify the root port on the local device.
Which operational command should the administrator use to view this information?
- A. show spanning-tree interface
- B. show spanning-tree bridge
- C. show ethernet-switching table
- D. show ethernet-switching interface
Answer : B
Question 14
What is a requirement for a basic GRE tunnel to come up and pass traffic on Juniper Networks devices?
- A. The GRE tunnel must be configured with keepalives enabled on both ends.
- B. The tunnel must be configured inside a routing-instance (VRF).
- C. The tunnel interface must be configured with family inet and an IP address in the same subnet as the physical source interface.
- D. The tunnel source and destination addresses must be reachable through the network.
Answer : D
Question 15
Click the Exhibit button.
The security team reports that all traffic from 10.10.10.50 must be blocked, including SSH. You apply the firewall filter shown in the exhibit to all interfaces on your Juniper Networks EX Series Switches. After applying the firewall filter, you notice that traffic from 10.10.10.50 is still passing through on all interfaces. The filter needs to be adjusted.
Which statement is correct in this scenario?
- A. The default term action needs to be changed to discard.
- B. Make the block-host term the top term in the filter.
- C. The action in the block-host term needs to be reject.
- D. protocol tcp needs to be added to the block-host term.
Answer : B