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Juniper JN0-643

Enterprise Routing and Switching (R) Professional (JNCIP-ENT)

Questions and Answers : 221
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Enterprise Routing and Switching (R) Professional (JNCIP-ENT)

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JN0-643 Questions and Answers

JN0-643


-- Exhibit --

Click the Exhibit button.

Traffic flows through your network, as shown in the exhibit. You have configured a rewrite rule on R1 to mark HTTP traffic with a specific DSCP value. What must you do to ensure that the HTTP traffic preserves its DSCP value as it leaves your CoS domain?


  1. Use behavior aggregate classifiers mapping the HTTP traffic to the specific DSCP value on R1 and R2.

  2. Use rewrite rules mapping the HTTP traffic to the specific DSCP value on R2 and R3.

  3. Use a rewrite rule mapping the HTTP traffic to the specific DSCP value on R3.

  4. Use the default settings already in place on the device.


Answer: D


QUESTION: 213

-- Exhibit –


-- Exhibit --

Click the Exhibit button.

In the exhibit, Switch A is an EX4200. VLAN10 is receiving tagged as well as untagged traffic from different ports. The administrator wants to mirror all tagged and untagged traffic entering VLAN10 to analyzer port ge-0/0/10. All VLAN tags must be preserved for traffic that is mirrored to the analyzer port. Which configuration will achieve this?


  1. set ethernet-switching-options analyzer vlan10_analyzer input vlan VLAN10 interface xe-1/0/0.0 set ethernet-switching-options analyzer vlan10_analyzer input vlan VLAN10 interface ge-0/0/2

    set ethernet-switching-options analyzer vlan10_analyzer output interface ge-0/0/10.0

  2. set ethernet-switching-options analyzer vlan10_analyzer input interface xe-1/0/0.0 set ethernet-switching-options analyzer vlan10_analyzer input interface ge-0/0/2

    set ethernet-switching-options analyzer vlan10_analyzer output interface ge-0/0/10.0

  3. set ethernet-switching-options analyzer vlan10_analyzer input ingress vlan VLAN10 set ethernet-switching-options analyzer vlan10_analyzer output interface ge-0/0/10.0 set vlans default interface ge-0/0/10.0

  4. set ethernet-switching-options analyzer vlan10_analyzer input ingress vlan VLAN10 set ethernet-switching-options analyzer vlan10_analyzer output interface ge-0/0/10.0 set vlans VLAN10 interface ge-0/0/10.0


Answer: C


QUESTION: 214

-- Exhibit –


-- Exhibit --

Click the Exhibit button.

As shown in the exhibit, the 10.10/16 prefix is redistributed into OSPF through R2 and R5. R2 is advertising the prefix with a Type 1 metric of 100 and R5 is advertising the prefix with a Type 2 metric of 10. What is the preferred path to reach 10.10/16 from R6?


  1. R6-R5

  2. R6-R4-R5

  3. R6-R4-R5-R2

  4. R6-R4-R3-R2


Answer: D


QUESTION: 215

-- Exhibit –


-- Exhibit --

Click the Exhibit button.

Based on the exhibit, which statement about the Layer 2 topology is true?


  1. A port on switch 3 or switch 4 towards the CST root (switch 6) is blocking traffic.

  2. A total of 64 MST instances for MST region A and region B can be configured.

  3. MSTI BPDUs are exchanged between MST regions and the CST root bridge.

  4. IST BPDUs are exchanged only between switches 1 and 2, and between switches 6 and 7.


Answer: A


QUESTION: 216

-- Exhibit --


{master:0}[edit]

user@router# run show ospf interface vl-10.20.10.2 extensive Interface State Area DR ID BDR ID Nbrs

vl-10.20.10.2 Down 0.0.0.0 0.0.0.0 0.0.0.0 0

TypE. Virtual, Address: 0.0.0.0, Mask: 0.0.0.0, MTU: 0, Cost: 1

Transit AreA. 0.0.0.1

Adj count: 0

Hello: 10, DeaD. 40, ReXmit: 5, Not Stub Auth typE. None

Protection typE. None, No eligible backup Topology default (ID 0) -> Down, Cost: 0

-- Exhibit --

Click the Exhibit button.

Your company is integrating another OSPF area into your existing OSPF infrastructure. You created a virtual link that spans Area 2 and connects Area 3 to the backbone area. Based on the exhibit, what is preventing the adjacency?


  1. The interface configured for the virtual link is incorrect. It should be a vt and not a vl interface.

  2. No designated router (DR) has been elected.

  3. The backup route to Area 2 has not been configured.

  4. The wrong transit area is configured.


Answer: D


QUESTION: 217

-- Exhibit –


-- Exhibit --

Click the Exhibit button.

In the exhibit, an EBGP session is currently established between R1 and R2. R2 changes its import policy to accept 10 of the routes it previously denied from R1. Which BGP


capability must be negotiated on the BGP session for R2 to install the routes accepted by the new policy?


  1. route refresh

  2. AddPath

  3. outbound route filtering (ORF)

  4. multiprotocol BGP (MBGP)


Answer: A


QUESTION: 218

-- Exhibit --

user@router> show bgp summary Groups: 1 Peers: 3 Down peers: 0

Table Tot Paths Act Paths Suppressed History Damp State Pending inet.0 0 0 0 0 0 0

inet6.0 1 0 0 0 0 0

Peer AS InPkt OutPkt OutQ Flaps Last Up/Dwn State|#Active/Received/Accepted/Damped... 2001:ffff::3:3 65550 43 43 0 0 18:20 Establ

inet6.0: 0/1/1/0

2001:ffff::3:4 65550 42 43 0 0 18:16 Establ

inet6.0: 0/0/0/0

2001:ffff::9:7 65550 42 43 0 0 18:00 Establ

inet6.0: 0/0/0/0

user@router> show route receive-protocol bgp 2001:ffff::3:3 inet.0: 32 destinations, 33 routes (32 active, 0 holddown, 0 hidden)

juniper_private1 .inet.0: 4 destinations, 4 routes (2 active, 0 holddown, 2 hidden)

iso.0: 1 destinations, 1 routes (1 active, 0 holddown, 0 hidden) mpls.0: 3 destinations, 3

routes (3 active, 0 holddown, 0 hidden) inet6.0: 10 destinations, 14 routes (10 active, 0

holddown, 0 hidden)

Prefix Nexthop MED Lclpref AS path 2001:1:2::/64 2001:ffff::3:3 100 I

user@router> show route 2001:1:2::

inet6.0: 10 destinations, 14 routes (10 active, 0 holddown, 0 hidden)

+ = Active Route, - = Last Active, * = Both 2001:1:2::/64 *[OSPF3/10] 01:54:11, metric 201

> to fe80::217:cb03:2448:bd00 via fe-0/0/1.804 [BGP/170] 00:18:43, localpref 100, from 2001:ffff::3:3 AS path: I

> to fe80::217:cb03:2448:bd00 via fe-0/0/1.804


user@router> show route advertising-protocol bgp 2001:ffff::9:7 user@router> show configuration protocols bgp

group ibgpv6 { type internal;

local-address 2001:ffff::3:5;

cluster 10.0.3.4; neighbor 2001:ffff::3:3; neighbor 2001:ffff::3:4; neighbor 2001:ffff::9:7;

}

user@router>

-- Exhibit --

Click the Exhibit button.

You are using an IBGP route reflector within your network. Your route reflector has received the 2001:1:2::/64 prefix, but it is not advertising the prefix to its cluster members. After examining the route reflector, you notice the output shown in the exhibit. Which configuration statement causes the route reflector to transmit the route to its IBGP peers?


  1. set protocols bgp group ibgpv6 advertise-inactive

  2. set protocols bgp group ibgpv6 accept-remote-nexthop

  3. set protocols bgp group ibgpv6 multipath

  4. set protocols bgp group ibgpv6 include-mp-next-hop


Answer: A


QUESTION: 219

-- Exhibit --

{master:0}[edit]

user@router# show class-of-service classifiers {

inet-precedence normal-traffic { forwarding-class best-effort {

loss-priority low code-points [ my1 my2 ];

}

}

}

code-point-aliases { inet-precedence { my1 000; my2 001;

}

}

scheduler-maps { one {

forwarding-class expedited-forwarding scheduler special; forwarding-class best-effort scheduler normal;


}

}

schedulers { special {

transmit-rate percent 30; priority strict-high;

}

normal {

transmit-rate percent 70; priority low;

}

}

-- Exhibit --

Click the Exhibit button.

The configuration in the exhibit shows incoming traffic with specific IP precedence bits that should be mapped to a forwarding class named best-effort.

What must you add to complete this configuration?


  1. defined behaviors to the interfaces stanza in the class-of-service section

  2. rewrite-rules for the best-effort forwarding class

  3. a WRED drop-profile for the best-effort scheduler

  4. a firewall filter that matches and discards the original code point values


Answer: A


QUESTION: 220

-- Exhibit –


-- Exhibit --

Click the Exhibit button.

Based on the exhibit, why is R2 marking the routes coming from AS 200 as hidden?


  1. R3 has an import policy filtering all routes.

  2. R4 is not configured with a next-hop self policy.

  3. R2 does not have a route to the peer ID of R4.

  4. AS 200 is configured with the advertise-inactive option.


Answer: C


QUESTION: 221

-- Exhibit --

user@router> show configuration routing-options rib-groups {

foo {

import-rib [ inet.8 inet.2 inet.0 ];

}

user@router> show configuration protocols pim rib-group inet foo;

interface all;

-- Exhibit --

Click the Exhibit button.

Based on the configuration in the exhibit, which routing table is used for IPv4 multicast RPF checks?


  1. inet.0

  2. inet.2

  3. foo.inet.0

  4. inet.8


Answer: D

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