Juniper jncis-ent routing and switching online test for free with explanations and realtime examples part 2| 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. In a BGP confederation network, what type of peering session is used within an individual sub-AS?

A.
IBGP
B.
CBGP
C.
EBGP
D.
MBGP

Correct Answers :

[A]

Explanation :

Each sub-AS in a BGP confederation network maintains an IBGP full mesh.

2. Which RSVP object contains the tunnel ID value assigned by the ingress router to identify the egress router for the LSP?

A.
Sender-Template
B.
Sender-Tspec
C.
Session
D.
Session Attribute

Correct Answers :

[C]

Explanation :

The ingress router of an RSVP LSP assigns a unique value to the tunnel through the tunnel ID. This value is contained in the Session object.

3. What is the default value of the OSPF domain ID within the JUNOS software?

A.
0.0.0.0
B.
10.10.10.1
C.
172.16.1.1
D.
192.168.1.1

Correct Answers :

[A]

Explanation :

By default, all routing instances operating OSPF are not assigned a domain ID value. This is interpreted as 0.0.0.0 by all PE routers.

4. Which TACACS message type contains the user’s login name and is sent by the router to the server?

A.
Start
B.
End
C.
Reply
D.
Continue

Correct Answers :

[A]

Explanation :

After receiving the user’s login name at the router prompt, the router sends it to the TACACS server in a Start message.

5. Which graceful restart mode signifies that the local router has set the RR bit in its graceful restart TLV?

A.
Restart candidate
B.
Possible helper
C.
Helper
D.
Disabled helper

Correct Answers :

[A]

Explanation :

An IS-IS router sets the restart request (RR) bit in its restart TLV to signify that it has recently experienced a restart event and that each neighbor should maintain an Up adjacency with the local router. This moves the restarting router into the restart candidate mode.

6. When a CE router in a Layer 3 VPN is forwarding Internet-bound traffic across its VRF interface, what command should be configured in the [edit routing-instances VPN routing-options static] hierarchy on the PE router?

A.
set route 0/0 next-table inet.0
B.
set route 0/0 discard
C.
set route 0/0 reject
D.
set route 0/0 lsp-next-hop to-Internet

Correct Answers :

[A]

Explanation :

The VRF routing instance requires the configuration of a static default route to allow packets to reach Internet destinations. The key attribute assigned to that route is the next-table option, which allows the PE router to consult inet.0 for route destinations.

7. Which bit in the router LSA is set to signify that the local router is an ASBR?

A.
V bit
B.
E bit
C.
B bit
D.
N/P bit

Correct Answers :

[B]

Explanation :

The E bit in the router LSA is set when the local router has a configured routing policy applied to its OSPF configuration.

8. Which BGP attribute is added by a route reflector to describe the router that first advertised a route to a BGP route reflector ?

A.
Cluster ID
B.
Cluster List
C.
Originator ID
D.
Router ID

Correct Answers :

[C]

Explanation :

The Originator ID describes the router that first advertised a route into a route reflection network. It is added by the route reflector and provides a second level of protection of loop avoidance.

9. During a failure mode, the ingress router can protect MPLS traffic flows when which feature is configured?

A.
Adaptive mode
B.
Optimization
C.
Primary path
D.
Secondary path

Correct Answers :

[D]

Explanation :

When an ingress router has a secondary path configured for an LSP, it establishes that path and begins forwarding traffic during a failure of the primary path.

10. Which RADIUS message type is sent by the server to signal that a user is allowed to log into the router?

A.
Access-Accept
B.
Access-Reject
C.
Access-Authenticate
D.
Access-Request

Correct Answers :

[A]

Explanation :

Once the username and password are validated by the server, an Access-Accept message is sent to the router. This allows the user to log into the device.

11. When it is applied to a policy, which route(s) matches the prefix list called these-routes?
prefix-list these-routes{
192.168.1.0/24;
192.168.2.0/24;
192.168.3.0/24;
192.168.4.0/24;
}

A.
192.168.0.0 /16
B.
192.168.1.0 /24
C.
192.168.2.0 /28
D.
192.168.3.32 /30

Correct Answers :

[B]

Explanation :

A prefix list within a routing policy always assumes a route-filter match type of exact. Therefore, only routes explicitly listed in the prefix list will match. Only the 192.168.1.0 /24 route fits this criterion.

12. You’re examining the output of the show route detail command and see a BGP path advertisement with an inactive reason of Update source. What selection criterion caused this route to not be selected?

A.
MED
B.
EBGP vs. IBGP
C.
IGP Cost
D.
Peer ID

Correct Answers :

[D]

Explanation :

The source of any BGP update represents the Peer ID route selection criterion. This is used when multiple advertisements are received from the same router (constant router ID). This causes the inactive reason to be displayed as Update source.

13. An MPLS transit router receives a Path message and finds that the first hop listed in the ERO is strictly assigned. Additionally, the address listed in the ERO doesn’t match the local interface address the message was received on. What does the router do at this point?

A.
Generates a PathErr message and forwards it upstream
B.
Processes the Path message and forwards it downstream
C.
Generates a PathTear message and forwards it upstream
D.
Generates a Resv message and forwards it downstream

Correct Answers :

[A]

Explanation :

When any MPLS router encounters the situation described in the question, the Path message is not processed any further. In addition, a PathErr message is generated and sent upstream to the ingress router, informing it of the incorrect address within the ERO.

14. Which JUNOS software configuration component is used to allocate resources to a particular queue?

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

Correct Answers :

[B]

Explanation :

A scheduler allows a network administrator to allocate resources, such as transmission bandwidth, to a queue in the router.

15. What is the second bootstrap router election criterion?

A.
Lowest configured priority value
B.
Highest configured priority value
C.
Lowest IP address
D.
Highest IP address

Correct Answers :

[D]

Explanation :

When multiple candidate bootstrap routers are sharing the same priority value, the router with the highest router ID is elected the BSR for the domain.

16. Which policy is always evaluated last in a policy chain?

A.
The first configured import policy
B.
The last configured import policy
C.
The first configured export policy
D.
The last configured export policy
E.
The protocol default policy

Correct Answers :

[E]

Explanation :

The default policy for a specific protocol is always evaluated last in a policy chain.

17. What is a possible result of evaluating called-policy when the router encounters a configuration of from policy called-policy?

A.
The route is accepted by called-policy.
B.
The route is rejected by called-policy.
C.
A true or false result is returned to the original policy.
D.
Nothing occurs by this evaluation.

Correct Answers :

[C]

Explanation :

The evaluation of a policy subroutine only returns a true or false result to the calling policy. A route is never accepted or rejected by a subroutine policy.

18. The policy called outer-policy is applied as an export policy to BGP. What happens to the 10.10.10.0 /24 static route when it is evaluated by this policy?
outer-policy {
term find-routes {
from policy inner-policy;
then accept;
}
term reject-all-else {
then reject;
}
}
inner-policy {
term find-routes {
from protocol static;
then reject;
}
}

A.
It is accepted by outer-policy.
B.
It is rejected by outer-policy.
C.
It is accepted by inner-policy.
D.
It is rejected by inner-policy.

Correct Answers :

[B]

Explanation :

The policy subroutine returns a false result to outer-policy for the 10.10.10.0 /24 static route. The find-routes term in that policy then doesn’t have a match, so the route is evaluated by the reject-all-else term. This term matches all routes and rejects them. This is where the route is actually rejected.

19. Which route filter match type is assumed when a policy evaluates a prefix list?

A.
exact
B.
longer
C.
orlonger
D.
upto

Correct Answers :

[A]

Explanation :

A routing policy always assumes a match type of exact when it is evaluating a prefix list as a match criterion.

20. The policy expression of (policy-1 && policy-2) is applied as an export within BGP. Given the following policies, what happens when the local router attempts to advertise the 172.16.1.0 /24 BGP route?
policy-1 {
term accept-routes {
from {
route-filter 172.16.1.0/24 exact;
}
then accept;
}
}
policy-2 {
term reject-routes {
from {
route-filter 172.16.1.0/24 exact;
}
then reject;
}
}

A.
It is accepted by policy-1.
B.
It is rejected by policy-2.
C.
It is accepted by the BGP default policy.
D.
It is rejected by the BGP default policy.

Correct Answers :

[B]

Explanation :

The result of policy-1 is true, but the result of policy-2 is false. This makes the entire expression false, and policy-2 guaranteed its result. Therefore, the action of then reject in policy-2 is applied to the route and it is rejected.

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