Latest Juniper Jncis-ent Routing and switching online test for free Part 1 Infibee.com

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Instructions

Total Questions 20
Each question carry 1 mark
Must answer all the questions (otherwise report card will not be generated)
If you dont want to take a test, simply click the check answers button and view all the answers with explanations
Do Not Refresh the Page
No Time Limit
Good Luck :)

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1. What forms of authentication does the JUNOS software utilize for BGP(Choose Two) ?

A.
None
B.
Simple
C.
Plain-text
D.
MD5

Correct Answers :

[A, D]

Explanation :

By default, BGP sessions are not authenticated. The use of the authentication-key command enables MD5 authentication.

2. The regular expression ^65.*:*$ matches which community value(s)?

A.
64:123
B.
65:1234
C.
64512:123
D.
65512:1234

Correct Answers :

[B, D]

Explanation :

The first portion of the expression requires an AS value to begin with a 65 and contain any other values. Only Options B and D fit that criterion. The second portion of the expression can be any possible value. This means that both Options B and D match the expression.

3. What value is used within the final two octets of the LDP ID to signify that the local router is using a per-node label allocation method?

A.
0
B.
1
C.
10
D.
100

Correct Answers :

[A]

Explanation :

When a value of 0 is used with the router ID to identify the local router’s label space, it means that the router is using a per-node label allocation mechanism.

4. How many bits are used in an IPv6 address?

A.
32
B.
64
C.
128
D.
256

Correct Answers :

[C]

Explanation :

An IPv6 address uses 128 bits to fully address a host. This provides for a substantial increase in addressing space over IPv4.

5. A PIM domain is using a static configuration to learn the RP address. Which type of forwarding tree is created from the RP to the last-hop router?

A.
Rendezvous point tree
B.
Reverse-path forwarding tree
C.
Shortest-path tree
D.
Source-based tree

Correct Answers :

[A]

Explanation :

A PIM-SM domain always creates a rendezvous point tree (RPT) from the RP to the last hop router. The shortest-path tree is created between the first-hop and last-hop routers, while a source-based tree is used in a dense-mode PIM domain. Multicast networks don’t use reversepath forwarding trees. The reverse-path concept is used to prevent forwarding loops in the network.

6. After the CSPF algorithm runs through the information in the TED, what is passed to RSVP to signal the LSP?

A.
A single loose-hop ERO listing the egress address
B.
A single strict-hop ERO listing the first router in the path
C.
A complete loose-hop ERO listing each router in the path
D.
A complete strict-hop ERO listing each router in the path

Correct Answers :

[D]

Explanation :

The result of a CSPF calculation is a complete strict-hop ERO of all routers in the path of the LSP. This information is sent to the RSVP process, which signals the path and establishes it in the network.

7. In a stable network environment, by default how often does the JUNOS software refresh its locally generated LSAs?

A.
Every 20 minutes
B.
Every 30 minutes
C.
Every 50 minutes
D.
Every 60 minutes

Correct Answers :

[C]

Explanation :

The MaxAge of an LSA is 60 minutes (3600 seconds). Before reaching the MaxAge, the JUNOS software refreshes the locally generated LSAs at 50-minute intervals.

8. What is the maximum number of area addresses supported by the JUNOS software for IS-IS?

A.
1
B.
2
C.
3
D.
4

Correct Answers :

[C]

Explanation :

The JUNOS software supports up to three area addresses per router.

9. Your local AS value is 1234. Your EBGP peer is expecting you to establish the peering session using AS 6789. What JUNOS software command allows this session to be established successfully?

A.
as-override
B.
as-loops
C.
local-as
D.
remove-private

Correct Answers :

[C]

Explanation :

The local-as command allows the BGP peering session to be established using an AS value other than the value configured within the routing-options hierarchy.

10. Which JUNOS software command is used to allocate the amount of memory space used for queuing?

A.
transmit-rate
B.
drop-profile
C.
priority
D.
buffer-size

Correct Answers :

[D]

Explanation :

The buffer-size command is used by an individual queue to determine the amount of space to use for storing information.

11. Which Layer 2 VPN access technology connects different data-link encapsulations on either side of the provider network?

A.
Frame Relay
B.
ATM
C.
Ethernet VLAN
D.
IP Interworking

Correct Answers :

[D]

Explanation :

By default, the data-link encapsulations must match on either side of the provider network. Only the use of IP Interworking relaxes this restriction by allowing this dissimilar connection.

12.By default, how many attempts does the JUNOS software make to a configured RADIUS server?

A.
1
B.
2
C.
3
D.
4

Correct Answers :

[C]

Explanation :

By default, the JUNOS software makes three attempts to reach a configured RADIUS server.

13. What two functions are supported by an opaque LSA within the JUNOS software?

A.
Virtual link
B.
Graceful restart
C.
Authentication
D.
Traffic engineering

Correct Answers :

[B, D]

Explanation :

The JUNOS software currently uses opaque LSAs to support graceful restart and traffic engineering. The link-local (type 9) opaque LSA is used with graceful restart, and the area-local (type 10) opaque LSA is used with traffic engineering.

14. What is the default JUNOS software method for using the MED attribute?

A.
Deterministic MED
B.
Always compare MEDs
C.
Never compare MEDs
D.
Cisco compatibility mode

Correct Answers :

[A]

Explanation :

The JUNOS software always groups incoming path advertisements by the neighboring AS and evaluates the MED values within each group. This process is called deterministic MED

15. Which two sources of routing information automatically populate the inet.2 routing table with unicast routes to be used for RPF validation checks?

A.
MBGP
B.
Multi-topology IS-IS
C.
OSPF
D.
Static routes

Correct Answers :

[A, B]

Explanation :

Both BGP and IS-IS are capable of automatically populating the inet.2 routing table with unicast routes. These routes are designed for use within the context of a multicast RPF check.

16. What MPLS feature allows for the protection of traffic already transmitted into the LSP by the ingress router?

A.
Adaptive mode
B.
Fast reroute
C.
Primary path
D.
Secondary path

Correct Answers :

[B]

Explanation :

Fast reroute is a temporary solution to a failure scenario in which each router protects traffic already traveling through the LSP.

17. Which JUNOS software configuration component associates a specific interface queue with a human-friendly name?

A.
Forwarding class
B.
Scheduler
C.
Rewrite rule
D.
Code-point alias

Correct Answers :

[A]

Explanation :

A forwarding class is the mapping of a human-readable name to a specific interface queue within the JUNOS software.

18. Which IPv6 header is used by a host to source-route a packet through the network?

A.
Hop-by-hop options
B.
Destination options
C.
Fragment
D.
Routing

Correct Answers :

[D]

Explanation :

The routing header in an IPv6 packet is used to source-route the packet across the network. It contains a list of addresses through which the packet must pass.

19. You have three import policies configured on your router. The alter-lp policy has an action of then local-preference 200, the delete-comms policy has an action of then community delete all-comms, and the set-nhs policy has an action of then set next-hop self. Each policy has no configured match criteria and no other actions configured. In what order should these policies be applied?

A.
import [alter-lp delete-comms set-nhs]
B.
import [delete-comms set-nhs alter-lp]
C.
import [set-nhs alter-lp delete-comms]
D.
All of the above

Correct Answers :

[D]

Explanation :

Since each of the policies contains no terminating action, they can be applied in any order desired. The BGP default policy will accept all incoming BGP routes.

20. What is the default IS-IS interface metric assigned to all non-loopback interfaces in the JUNOS software?

A.
0
B.
1
C.
10
D.
20

Correct Answers :

[C]

Explanation :

Each IS-IS interface receives a default metric value of 10 for all interfaces. The exception to this rule is the loopback interface, which receives a metric value of 0.

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