Enterprise Routing and Switching, Specialist (JNCIS-ENT) v1.0
Question 1
In RSTP, which three port roles are associated with the discarding state? (Choose three.)
- A. root
- B. backup
- C. alternate
- D. disabled
- E. designated
Answer : BCD
Question 2
Two routers share the same highest priority and start time.
In this situation, what is evaluated next when determining the designated router?
- A. The router with the lowest router ID become the DR.
- B. The router with the highest router ID becomes the DR.
- C. The routers perform another DR election.
- D. The router with the highest MAC address become the DR.
Answer : B
Question 3
Which two statements about redundant trunk groups on EX Series switches are correct? (Choose two.)
- A. Redundant trunk groups load-balance traffic across two designated uplink interfaces.
- B. If the active link fails, then the secondary link automatically takes over.
- C. Layer 2 control traffic is permitted on the secondary link.
- D. Redundant trunk groups must be connected to the same aggregation switch.
Answer : BC
Question 4
You are attempting to configure the initial two aggregated Ethernet interfaces on a router but there are no aggregated Ethernet interfaces available.
In this scenario, which configuration will enable these interfaces on this router?
-
A.
-
B.
-
C.
-
D.
Answer : B
Question 5
Which two statements about BGP facilitate the prevention of routing loops between two autonomous systems? (Choose two.)
- A. EBGP routers will append their AS number when advertising routes to their neighbors.
- B. EBGP routers will only accept routes that contain their own AS number in the AS_PATH.
- C. EBGP routers will drop routes that contain their own AS number in the AS_PATH.
- D. EBGP routers will prepend their AS number when advertising routes to their neighbors.
Answer : AC
Question 6
Which statement is correct about the IS-IS ISO NET address?
- A. An ISO NET address defined with a system ID of 0000.0000.0000 must be selected as the DIS.
- B. An ISO NET address must be unique for each device in the network.
- C. You can only define a single ISO NET address per device.
- D. The Area ID must match on all devices within a L2 area.
Answer : B
Question 7
What is the default MAC age-out timer on an EX Series switch?
- A. 30 minutes
- B. 30 seconds
- C. 300 minutes
- D. 300 seconds
Answer : D
Question 8
Which two statements are correct about generated routes? (Choose two.)
- A. Generated routes require a contributing route.
- B. Generated routes show a next hop in the routing table.
- C. Generated routes appear in the routing table as static routes.
- D. Generated routes cannot be redistributed into dynamic routing protocols.
Answer : AB
Question 9
What is a purpose of using a spanning tree protocol?
- A. to look up MAC addresses
- B. to eliminate broadcast storms
- C. to route IP packets
- D. to tunnel Ethernet frames
Answer : B
Question 10
Which two types of tunnels are able to be created on all Junos devices? (Choose two.)
- A. STP
- B. GRE
- C. IP-IP
- D. IPsec
Answer : BC
Question 11
You want to enable redundancy for the EBGP peering between the two routers shown in the exhibit.
Which three actions will you perform in this scenario? (Choose three.)
- A. Configure BGP multihop.
- B. Configure loopback interface peering.
- C. Configure routes for the peer loopback interface IP addresses.
- D. Configure an MD5 peer authentication.
- E. Configure a cluster ID.
Answer : ABC
Question 12
Which two statements about redundant trunk groups on EX Series switches are correct? (Choose two.)
- A. Redundant trunk groups use spanning tree to provide loop-free redundant uplinks.
- B. Redundant trunk groups load balance traffic across two designated uplink interfaces.
- C. Layer 2 control traffic is permitted on the secondary link.
- D. If the active link fails, then the secondary link automatically takes over.
Answer : CD
Question 13
Which two mechanisms are part of building and maintaining a Layer 2 bridge table? (Choose two.)
- A. blocking
- B. flooding
- C. learning
- D. listening
Answer : BC
Question 14
Which two statements are correct about using firewall filters on EX Series switches? (Choose two.)
- A. You can deploy only stateless firewall filters on an EX Series switch.
- B. You can only apply firewall filters to Layer 2 traffic on an EX Series switch.
- C. You can apply firewall filters to both Layer 2 and Layer 3 traffic on an EX Series switch.
- D. You can deploy both stateless and stateful firewall filters on an EX Series switch.
Answer : AC
Question 15
You want to use filter-based forwarding (FBF) on your Internet peering router to load-balance traffic to two directly connected ISPs based on the source address.
Which two statements are correct in this scenario? (Choose two.)
- A. FBF uses the no-forwarding routing instance type.
- B. FBF uses the forwarding routing instance type.
- C. RIB groups are used to copy routes from the inet.0 routing table.
- D. RIB groups are used to hide routes in the inet.0 routing table.
Answer : BC