最新的Juniper JN0-643免費考試真題

問題1

You are asked to create a BGP routing policy that will delete all communities and reject routes with the community 64321:1234.
Which policy will accomplish this task?

A. user@router#show policy-options
policy-statement filter-on-community {
term nothing-with-1234 {
from community AS64321-community;
then reject;
}
term remove-all-communities {
then {
community delete all-communities;
}
}
}
community all-communities members *:*;
community AS64321-community members 64321:1234;

B. user@router#show policy-options
policy-statement filter-on-community {
term nothing-with-1234 {
from community AS64321-community;
then reject;
}
term remove-AS65001 {
from community AS65001-community;
then {
community delete AS65001-community;
}
}
}
community AS64321-community members 64321:1234;
community AS65001-community members 65001:1001;

C. user@router# show policy-options
policy-statement filter-on-community {
term remove-all-communities {
then {
community delete all-communities;
}
}
term nothing-with-1234 {
from community AS64321-community;
then reject;
}
}
community AS64321-community members 64321:1234;
community all-communities members *:*;

D. user@router# show policy-options
policy-statement filter-on-community {
term remove-AS65001 {
from community AS65001-community;
then {
community delete AS65001-community;
}
}
term nothing-with-1234 {
from community AS64321-community;
then reject;
}
}
community AS64321-community members 64321:1234;
community AS65001-community members 65001:1001;

正確答案: A

問題2

-- 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: 1
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: 3
-- 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 67.176.255.8 is preferred.

B. The paths through 67.176.255.7 and 67.176.255.8 become active to allow load- balancing.

C. The path through 67.176.255.5 is preferred.

D. The path through 67.176.255.7 is preferred.

正確答案: A

問題3

-- Exhibit -
-- Exhibit --
Click the Exhibit button.
Referring to the exhibit and based on the output below from Sw-1 and Sw-2, which statement is true?
Sw-1> show spanning-tree mstp configuration
MSTP information
Context identifier : 0
Region name : juniper
Revision : 1
Configuration digest : 0x9357ebb7a8d74dd5fef4f2bab50531aa
MSTI Member VLANs
0 0-9,11-19,21-4094
1 10
2 20
Sw-2# run show spanning-tree mstp configuration
MSTP information
Context identifier : 0
Region name : juniper
Revision : 1
Configuration digest : 0x387b5f2ea2394b14e091f0921ee7b9a8
MSTI Member VLANs
0 0-9,11-14,16-19,21-4094
1 10,15
2 20

A. Sw-1 and Sw-2 are in different MSTP regions.

B. There will be only one CIST root bridge.

C. There will be only one CST root bridge.

D. There will be only one MSTI 2 root bridge.

正確答案: A

問題4

Referring to the exhibit, R2 is exporting the route for server1 as a Type 2 external route and
R6 is exporting the route for server 1 as a type 1 external route in OSPF. Which path is taken to reach server-1 from user1?

A. R1>R4>R6

B. R1>R2

C. R1>R2>R4>R6

D. R1>R3>R6

正確答案: C

問題5

Which statement is true about LLDP?

A. It dynamically manages VLAN registration in a LAN.

B. It maintains a separate spanning-tree instance for each VLAN.

C. It allows you to split a broadcast domain into multiple isolated broadcast subdomains.

D. It is a Layer 2 protocol that facilitates network and neighbor discovery.

正確答案: D

問題6

-- Exhibit -

-- Exhibit --
Click the Exhibit button.
Referring to the exhibit, which two statements are true regarding the MSTP port role and port state of ge-0/0/0 and ge-0/0/1 on SW1?

A. Port ge-0/0/0 is a root port and ge-0/0/1 is an alternate port.

B. Both ports are in a forwarding state.

C. Both ports are designated ports.

D. Port ge-0/0/0 is a root port and ge-0/0/1 is in a forwarding state.

正確答案: B,C

問題7

Which statement regarding LLDP update messages is correct?

A. Updates are advertised every 60 seconds by default.

B. Updates require bidirectional communication.

C. Updates can be triggered by local changes.

D. Updates can be secured using the MD5 algorithm.

正確答案: C

問題8

-- Exhibit --
{master:0}[edit]
user@switch# show protocols vstp
vlan 100;
{master:0}[edit]
user@switch# run show spanning-tree bridge
STP bridge parameters
Context ID : 1
Enabled protocol : RSTP
STP bridge parameters for VLAN 100
Root ID : 32868.50:c5:8d:ae:94:80
Hello time : 2 seconds
Maximum age : 20 seconds
Forward delay : 15 seconds
Message age : 0
Number of topology changes : 0
Local parameters
Bridge ID : 32868.50:c5:8d:ae:94:80
Extended system ID : 1
Internal instance ID : 0
{master:0}[edit]
user@switch# run show spanning-tree interface
{master:0}[edit]
user@switch#
-- Exhibit --
Click the Exhibit button.
Based on the output shown in the exhibit, why is VSTP not working for VLAN 100?

A. Your MSTI is misconfigured.

B. RSTP is configured in addition to VSTP.

C. No native VLAN is configured.

D. No interfaces are assigned to VLAN 100.

正確答案: D

問題9

Which three statements are correct about source specific multicast (SSM) on the junos
OS? (Choose three)

A. IGMPv2 and IGMPv3 can be used with SSM.

B. SSM requires the use of an RP

C. IT HAS AN DEDICATED address block

D. SSM does not require the use of an RP

E. SSM must use the232/8 address range

正確答案: A,C,D

問題10

Which statement is true about MVRP?

A. It maps multiple independent spanning-tree instances onto one physical topology.

B. It dynamically manages VLAN registration in a LAN.

C. It allows you to split a broadcast domain into multiple isolated broadcast subdomains.

D. It is a Layer 2 protocol that facilitates network and neighbor discovery.

正確答案: B

說明：（僅 Fast2test 成員可見）

問題11

-- Exhibit -

-- Exhibit --
Click the Exhibit button.
In the exhibit, R5 is receiving five 200.1.1.x routes from the RIP router, and is advertising them into Area 1 using an export policy. You want to summarize the RIP routes into Area 0 with the most specific prefix.
Which configuration will accomplish goal?

A. [edit protocols]
user@R1# show
ospf {
area 0.0.0.0 {
area-range 200.1.1.0/28;
interface ge-0/0/1.0;
interface ge-0/0/2.0;
interface lo0.0;
}
area 0.0.0.1 {
nssa {
default-lsa type-7;
}
interface ge-0/0/3.0;
}
}

B. [edit protocols]
user@R1# show
ospf {
area 0.0.0.0 {
area-range 200.1.1.0/29;
interface ge-0/0/1.0;
interface ge-0/0/2.0;
interface lo0.0;
}
area 0.0.0.1 {
nssa {
default-lsa type-7;
}
interface ge-0/0/3.0;
}
}

C. [edit protocols]
user@R1# show
ospf {
area 0.0.0.0 {
interface ge-0/0/1.0;
interface ge-0/0/2.0;
interface lo0.0;
}
area 0.0.0.1 {
nssa {
default-lsa type-7;
area-range 200.1.1.0/29;
}
interface ge-0/0/3.0;
}
}

D. [edit protocols]
user@R1# show
ospf {
area 0.0.0.0 {
interface ge-0/0/1.0;
interface ge-0/0/2.0;
interface lo0.0;
}
area 0.0.0.1 {
nssa {
default-lsa type-7;
area-range 200.1.1.0/28;
}
interface ge-0/0/3.0;
}
}

正確答案: C

最新的Juniper Enterprise Routing and Switching, Professional (JNCIP-ENT) - JN0-643免費考試真題

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