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Exam Details

Exam Code
:JN0-643
Exam Name
:Enterprise Routing and Switching, Professional (JNCIP-ENT)
Certification
:Juniper Certifications
Vendor
:Juniper
Total Questions
:287 Q&As
Last Updated
:Mar 24, 2025

Juniper Juniper Certifications JN0-643 Questions & Answers

Question 81:

-- Exhibit
-- Exhibit -
Click the Exhibit button.
Referring to the exhibit, you want to configure Switch-1 to allow a user on interface ge-0/0/10 to accommodate both voice and data traffic. Your phones and your switches are LLDP-MED capable.
What is the minimal configuration that allows LLDP-MED to autoconfigure your phone's voice VLAN?
A. set interfaces ge-0/0/10 unit 0 family ethernet-switching port-mode trunk set interfaces ge-0/0/10 unit 0 family ethernet-switching vlan members voice_vlan set interfaces ge-0/0/10 unit 0 family ethernet- switching native-vlan-id data_vlan set ethernet-switching-options voip interface ge-0/0/10.0 vlan voice_vlan set protocols lldp-med interface ge-0/0/10.0
B. set interfaces ge-0/0/10 unit 0 family ethernet-switching port-mode trunk set interfaces ge-0/0/10 unit 0 family ethernet-switching vlan members voice_vlan set interfaces ge-0/0/10 unit 0 family ethernet- switching native-vlan-id data_vlan set ethernet-switching-options voip interface ge-0/0/10.0 vlan voice_vlan set protocols lldp interface ge-0/0/10.0
C. set interfaces ge-0/0/10 unit 0 family ethernet-switching port-mode access set interfaces ge-0/0/10 unit 0 family ethernet-switching vlan members data_vlan set ethernet-switching-options voip interface ge- 0/0/10.0 forwarding-class assured-forwarding set protocols lldp-med interface ge-0/0/10.0
D. set interfaces ge-0/0/10 unit 0 family ethernet-switching port-mode access set interfaces ge-0/0/10 unit 0 family ethernet-switching vlan members data_vlan set ethernet-switching-options voip interface ge- 0/0/10.0 vlan voice_vlan set protocols lldp-med interface ge-0/0/10.0

Correct Answer: D
Question 82:

-- Exhibit
-- Exhibit -Click the Exhibit button.
Which statement about the non-ABR router in Area 2 in the exhibit is true?
A. The router has connectivity to all areas.
B. The router has connectivity to Area 2 only.
C. The router has connectivity to Area 2 and Area 0.
D. The router has connectivity to Area 2 and Area 8.

Correct Answer: D
Question 83:

-- Exhibit
-- Exhibit -Click the Exhibit button.
As shown in the exhibit, a legacy IP phone is attached to Switch-1. The phone does not support LLDP- MED, but does allow configuration using DHCP. Existing network CoS policies dictate that VoIP traffic must use VLAN 10.
Which two actions put VoIP traffic onto VLAN 10? (Choose two.)
A. Configure protocols cdp on Switch-1.
B. Manually configure the voice VLAN on the IP phone.
C. Configure vlan 1 under forwarding-options bootp.
D. Configure interface ge-0/0/5 under forwarding-options bootp.

Correct Answer: BD
Question 84:

-- Exhibit -
ar 16 19:12:58.291474 BGP RECV 172.14.10.2+51230 -> 172.14.10.1+179 Mar 16 19:12:58.291624 BGP RECV message type 1 (Open) length 59 Mar 16 19:12:58.291688 BGP RECV version 4 as 2 holdtime 90 id 192.168.2.1 parmlen 30 Mar 16 19:12:58.291752 BGP RECV MP capability AFI=1, SAFI=1 Mar 16 19:12:58.291802 BGP RECV Refresh capability, code=128 Mar 16 19:12:58.291850 BGP RECV Refresh capability, code=2 Mar 16 19:12:58.291915 BGP RECV Restart capability, code=64, time=120, flags= Mar 16 19:12:58.291969 BGP RECV 4 Byte AS-Path capability (65), as_num 2 Mar 16 19:12:58.292385 advertising receiving-speaker only capabilty to neighbor 172.14.10.2 (External AS 2) Mar 16 19:12:58.292452 bgp_senD. sending 59 bytes to 172.14.10.2 (External AS 2) Mar 16 19:12:58.292522 Mar 16 19:12:58.292522 BGP SEND 172.14.10.1+179 -> 172.14.10.2+51230 Mar 16 19:12:58.292601 BGP SEND message type 1 (Open) length 59 Mar 16 19:12:58.293053 BGP SEND version 4 as 1 holdtime 90 id 192.168.2.1 parmlen 30 Mar 16 19:12:58.293124 BGP SEND MP capability AFI=1, SAFI=1 Mar 16 19:12:58.293173 BGP SEND Refresh capability, code=128 Mar 16 19:12:58.293221 BGP SEND Refresh capability, code=2 Mar 16 19:12:58.293284 BGP SEND Restart capability, code=64, time=120, flags= Mar 16 19:12:58.293336 BGP SEND 4 Byte AS-Path capability (65), as_num 1 Mar 16 19:12:58.293517 bgp_senD. sending 19 bytes to 172.14.10.2 (External AS 2) Mar 16 19:12:58.293573 Mar 16 19:12:58.293573 BGP SEND 172.14.10.1+179 -> 172.14.10.2+51230 Mar 16 19:12:58.293665 BGP SEND message type 4 (KeepAlive) length 19 Mar 16 19:12:58.296781 Mar 16 19:12:58.296781 BGP RECV 172.14.10.2+51230 -> 172.14.10.1+179 Mar 16 19:12:58.296897 BGP RECV message type 4 (KeepAlive) length 19 Mar 16 19:12:58.297451 bgp_senD. sending 19 bytes to 172.14.10.2 (External AS 2) Mar 16 19:12:58.297528 Mar 16 19:12:58.297528 BGP SEND 172.14.10.1+179 -> 172.14.10.2+51230 Mar 16 19:12:58.297600 BGP SEND message type 4 (KeepAlive) length 19 Mar 16 19:12:58.298102 bgp_senD. sending 23 bytes to 172.14.10.2 (External AS 2) Mar 16 19:12:58.298185 Mar 16 19:12:58.298185 BGP SEND 172.14.10.1+179 -> 172.14.10.2+51230 Mar 16 19:12:58.298273 BGP SEND message type 2 (Update) length 23 Mar 16 19:12:58.298322 BGP SEND End of RIB. AFI 1 SAFI 1 Mar 16 19:12:58.301834 Mar 16 19:12:58.301834 BGP RECV 172.14.10.2+51230 -> 172.14.10.1+179 Mar 16 19:12:58.301957 BGP RECV message type 4 (KeepAlive) length 19 Mar 16 19:12:58.302034 bgp_read_v4_messagE. done with 172.14.10.2 (External AS 2) received 19 octets 0 updates 0 routes Mar 16 19:12:58.304594 Mar 16 19:12:58.304594 BGP RECV 172.14.10.2+51230 -> 172.14.10.1+179 Mar 16 19:12:58.304702 BGP RECV message type 2 (Update) length 23 Mar 16 19:12:58.304765 BGP RECV End of RIB. AFI 1 SAFI 1 Mar 16 19:12:58.304848 bgp_read_v4_messagE. done with 172.14.10.2 (External AS 2) received 23 octets 1 update 0 routes Mar 16 19:13:22.968415 bgp_senD. sending 19 bytes to 172.14.10.2 (External AS 2) Mar 16 19:13:22.968586 Mar 16 19:13:22.968586 BGP SEND 172.14.10.1+179 -> 172.14.10.2+51230 Mar 16 19:13:22.968675 BGP SEND message type 4 (KeepAlive) length 19 Mar 16 19:13:26.901339 Mar 16 19:13:26.901339 BGP RECV 172.14.10.2+51230 -> 172.14.10.1+179 Mar 16 19:13:26.901464 BGP RECV message type 4 (KeepAlive) length 19 Mar 16 19:13:26.901543 bgp_read_v4_messagE. done with 172.14.10.2 (External AS 2) received 19 octets 0 updates 0 routes Mar 16 19:13:51.335927 bgp_senD. sending 19 bytes to 172.14.10.2 (External AS 2) Mar 16 19:13:51.348180 Mar 16 19:13:51.348180 BGP SEND 172.14.10.1+179 -> 172.14.10.2+51230 Mar 16 19:13:51.348296 BGP SEND message type 4 (KeepAlive) length 19 Mar 16 19:13:53.844160 Mar 16 19:13:53.844160 BGP RECV 172.14.10.2+51230 -> 172.14.10.1+179 Mar 16 19:13:53.844329 BGP RECV message type 4 (KeepAlive) length 19 Mar 16 19:13:53.844392 bgp_read_v4_messagE. done with 172.14.10.2 (External AS 2) received 19 octets 0 updates 0 routes -- Exhibit -Click the Exhibit button.
Looking at the traceoptions output, what is the current keepalive timer set for in BGP?
A. 1 second
B. 10 seconds
C. 30 seconds
D. 90 seconds

Correct Answer: C
Question 85:

-- Exhibit -
user@router> show interfaces ge-0/0/0 extensive | find "Queue counters" Queue counters: Queued packets Transmitted packets Dropped packets 0 best-effort 35244 35244 0 1 expedited-fo 258963 59852 199111 2 assured-forw 0 0 0 3 network-cont 1625847 1625847 0 ... -- Exhibit -Click the Exhibit button.
You recently deployed an SRX Series Gateway in your network. It uses the default class of service configuration. Based on the output in the exhibit, what reason explains the packet drops in Queue 1?
A. Interface ge-0/0/0 should be used only for management network operations.
B. Queue 0 has higher priority than Queue 1.
C. A policer is reclassifying all traffic into Queue 1.
D. No bandwidth reservation exists on Queue 1.

Correct Answer: D
Question 86:

-- Exhibit -
[edit]
user@R1# show routing-options router-id
router-id 1.1.1.1;
[edit]
user@R1# show protocols ospf
area 0.0.0.0 {
interface ge-0/0/7.0;
}
[edit]
user@R2# show routing-options router-id
router-id 2.2.2.2;
[edit]
user@R2# show protocols ospf
area 0.0.0.0 {
interface ge-0/0/8.0 {
priority 200;
}
}
[edit]
user@R3# show routing-options router-id
router-id 222.255.255.255;
[edit]
user@R3# show protocols ospf
area 0.0.0.0 {
interface ge-0/0/8.0;
}
[edit]
user@R4# show routing-options router-id
router-id 239.255.255.255;
[edit]
user@R4# show protocols ospf
area 0.0.0.0 {
interface ge-0/0/6.0 {
priority 0;
}
}
-- Exhibit -
Click the Exhibit button.
All four routers in the exhibit are in the same broadcast domain. The routers were powered on at the same time.
Based on the configurations, which devices are the DR and the BDR
A. R4 is the DR and R2 is the BDR.
B. R2 is the DR and R3 is the BDR.
C. R2 is the DR and R1 is the BDR.
D. R3 is the DR and R2 is the BDR.

Correct Answer: B
Question 87:

-- Exhibit -- Exhibit -
Click the Exhibit button.
In the exhibit, the 10.100/16 prefix is introduced at autonomous system 1 (AS1) and propagated through to AS3. Router A in AS3 receives two different paths to these prefixes, one through AS2 and the other through AS4. No BGP attributes have been altered.
Which path would router A prefer for the 10.100/16 prefix?
A. the route with the lowest interface address for the EBGP peering session
B. the route with the lowest local preference
C. the route to the EBGP peer that has the lowest RID
D. the route from the EBGP peer that arrived first

Correct Answer: D
Question 88:

-- Exhibit -[edit]
user@router# run show ospf database external lsa-id 71.23.48.0 extensive OSPF AS SCOPE link state database
Type ID Adv Rtr Seq Age Opt Cksum Len
Extern 71.23.48.0 67.176.255.5 0x80000001 114 0x22 0x171b 36 mask 255.255.248.0 Topology default (ID 0)
TypE. 2, MetriC. 0, Fwd addr: 0.0.0.0, TaG. 0.0.0.0 Aging timer 00:58:06 Installed 00:01:53 ago, expires in 00:58:06, sent 00:01:53 ago Last changed 00:01:53 ago, Change count:
Extern 71.23.48.0 67.176.255.7 0x8000005a 487 0x22 0x587e 36 mask 255.255.248.0 Topology default (ID 0)
TypE. 2, MetriC. 0, Fwd addr: 0.0.0.0, TaG. 0.0.0.0 Aging timer 00:51:52 Installed 00:08:01 ago, expires in 00:51:53, sent 00:07:59 ago Last changed 2d 19:33:58 ago, Change count: 1
Extern 71.23.48.0 67.176.255.8 0x8000005c 540 0x22 0xf73e 36 mask 255.255.248.0 Topology default (ID 0)
TypE. 1, MetriC. 30, Fwd addr: 0.0.0.0, TaG. 0.0.0.0 Aging timer 00:51:00 Installed 00:08:59 ago, expires in 00:51:00, sent 00:08:59 ago Last changed 00:08:59 ago, Change count:
-- Exhibit -
Click the Exhibit button.
As shown in the exhibit, a router is receiving three external LSAs for the prefix 71.23.48.0.
Which path is preferred?
A. The path through 67.176.255.5 is preferred.
B. The path through 67.176.255.7 is preferred.
C. The path through 67.176.255.8 is preferred.
D. The paths through 67.176.255.7 and 67.176.255.8 become active to allow load-balancing.

Correct Answer: C
Question 89:

-- Exhibit -user@router> show configuration routing-options autonomous-system 65550;
user@router> show configuration protocols bgp
group ibgp {
type internal;
neighbor 10.0.3.5;
}
group ibgpv6 {
type internal;
local-address 2001:ffff::3:4;
neighbor 2001:ffff::3:5;
}
group as65010 {
family inet {
unicast;
}
family inet6 {
unicast;
}
export as65010-out;
peer-as 65010;
neighbor 172.16.0.6;
}
user@router> show configuration policy-options
policy-statement as65010-out {
term locally-originated {
from as-path local-only;
then {
metric 7000;
}
}
term from-as65222 {
from as-path as65222-orig;
then as-path-prepend "65550 65550 65550 65550";
}
term transit-as701 {
from as-path transit-as701;
then {
metric 6;
}
}
then accept;
}
as-path local-only "(.*)";
as-path as65222-orig ".* 65222";
as-path transit-as701 ".* 701 .*";
user@router> show route advertising-protocol bgp 172.16.0.6
inet.0: 43 destinations, 47 routes (43 active, 0 holddown, 0 hidden) Prefix Nexthop MED Lclpref AS path
*
10.0.2.0/30 Self 7000 I
*
10.0.2.4/30 Self 7000 I
*
10.0.2.8/30 Self 7000 I
*
10.0.2.16/30 Self 7000 I
*
10.0.3.3/32 Self 7000 I
*
10.0.3.4/32 Self 7000 I
*
10.0.3.5/32 Self 7000 I
*
10.0.4.8/30 Self 7000 I
*
10.0.8.8/30 Self 7000 I
*
10.0.9.9/32 Self 7000 I
*
10.255.255.1/32 Self 7000 I
*
64.142.88.0/24 Self 7000 I
*
130.130.0.0/16 Self 6 65222 46375 701 14203 I
*
131.131.131.0/24 Self 6 65222 46375 701 14203 I
*
132.132.0.0/25 Self 6 65222 46375 701 32934 I
*
133.133.0.0/25 Self 6 65222 46375 701 32934 I
*
134.134.0.0/25 Self 65222 46375 14203 I
*
135.135.0.0/25 Self 65222 46375 14203 14203 I
*
172.16.0.4/30 Self 7000 I
*
172.16.0.12/30 Self 7000 I
*
172.16.200.0/30 172.16.0.6 7000 I
*
192.0.2.0/24 172.16.0.6 7000 I
*
192.168.50.0/24 Self 7000 I
*
192.168.253.0/24 Self 7000 I
*
200.200.0.0/16 172.16.0.6 7000 I
*
200.200.0.1/32 172.16.0.6 7000 I
*
200.200.1.1/32 172.16.0.6 7000 I
*
200.200.200.200/32 172.16.0.6 7000 I inet6.0: 23 destinations, 28 routes (23 active, 0 holddown, 0 hidden) Prefix Nexthop MED Lclpref AS path
*
::172.16.0.4/126 Self 7000 I
*
2001:1:1::/64 Self 7000 I
*
2001:1:2::/64 Self 7000 I
*
2001:ffff::3:3/128 Self 7000 I
*
2001:ffff::3:4/128 Self 7000 I
*
2001:ffff::3:5/128 Self 7000 I
*
2001:ffff::9:7/128 Self 7000 I
user@router> -- Exhibit -
Click the Exhibit button.
You are configuring an EBGP peer in a transit environment. You must advertise routes learned from other EBGP peers in your AS. Any routes originated from within your AS should have a MED of 7000 set. Any routes that originate in AS65222 should be prepended four times. Any routes that transit AS701 should have a MED set to 6. This scenario results in the unintended advertisement of internal 10.0.0.0/8 networks to your peer.
What caused the accidental advertisement of internal networks to your EBGP peer?
A. Your AS number of 65550 is a private AS number.
B. The BGP group as65010 is configured for both family inet unicast and family inet6 unicast protocol families.
C. The export policy as65010-out is misconfigured.
D. The as-path local-only includes a misconfigured regular expression.

Correct Answer: C
Question 90:

-- 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;
cs1 010;
cs2 011;
cs3 100;
cs4 101;
cs5 111;
cs6 111;
}
}
-- Exhibit -
Click the Exhibit button.
In the exhibit, you see a configuration for CoS. Incoming traffic with specific IP precedence bits should be mapped to a forwarding class named best-effort. A classifier named normal-traffic is defined.
What must you add to complete this configuration?
A. Include the option q-pic-large-buffer under the chassis hierarchy to accommodate the new code points.
B. Apply classifier normal traffic to the interface hierarchy under the class-of-service stanza.
C. Configure a rewrite marker on the ingress Gigabit Ethernet interface.
D. Add code point values for the expedited-forwarding forwarding class as well as the best- effort forwarding class.

Correct Answer: B

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Total Questions

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Juniper Juniper Certifications JN0-643 Questions & Answers

Question 81:

Question 82:

Question 83:

Question 84:

Question 85:

Question 86:

Question 87:

Question 88:

Question 89:

Question 90:

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Tips on How to Prepare for the Exams

Enterprise Routing and Switching, Professional (JNCIP-ENT)

Exam Details

Exam Code

Exam Name

Certification

Vendor

Total Questions

Last Updated

Juniper Juniper Certifications JN0-643 Questions & Answers

Question 81:

Question 82:

Question 83:

Question 84:

Question 85:

Question 86:

Question 87:

Question 88:

Question 89:

Question 90:

Related Exams:

Tips on How to Prepare for the Exams