JN0-643 Online Practice Questions and Answers

-- Exhibit -{master:0}[edit]

user@switch# show vlans

v1 {

vlan-id 1;

interface {

ge-0/0/1.0;

}

}

v2 {

vlan-id 2;

interface {

ge-0/0/2.0;

}

}

v3 {

vlan-id 3;

interface {

ge-0/0/1.0 {

}

{master:0}[edit]

user@switch# show interfaces ge-0/0/3

unit 0 {

family ethernet-switching {

port-mode trunk;

}

}

{master:0}[edit]

user@switch# run show vlans

Name Tag Interfaces

default

None

v1 1

ge-0/0/1.0*, ge-0/0/3.0*

v2 2

ge-0/0/2.0*, ge-0/0/3.0*

v3 3

ge-0/0/1.0*, ge-0/0/3.0*

-- Exhibit -

Click the Exhibit button.

Referring to the exhibit, what would explain interface ge-0/0/3.0 being active in VLANs v1, v2, and v3?

A. You have enabled RSTP for interface ge-0/0/3.0.

B. You have enabled MVRP for interface ge-0/0/3.0.

C. You have enabled MSTP for interface ge-0/0/3.0.

D. You have enabled L2PT for interface ge-0/0/3.0.

You must configure a multifield classifier on ge-1/0/0. This classifier must match only TCP traffic from port number 79, set the loss priority to high, and classify the traffic as expedited- forwarding. The inbound traffic has no previous CoS markings.

Which configuration meets these requirements?

A. [edit firewall] user@switch# show filter ef_classifier_mf term 1 { from { protocol tcp; destination-port 79; } then { loss-priority high; forwarding-class expedited-forwarding; } [...] }

B. [edit firewall] user@switch# show filter ef_classifier_mf term 1 { from { protocol tcp; source-port 79; } then { loss-priority high; forwarding-class expedited-forwarding; }

[...]

}

C. [edit firewall] user@switch# show filter ef_classifier_mf term 1 { from { protocol tcp; destination-port 79; } then { loss-priority low; forwarding-class expedited-forwarding; } [...] }

D. [edit firewall] user@switch# show filter ef_classifier_mf term 1 { from { protocol tcp; source-port 79; dscp ef; } then { loss-priority high; accept; } [...] }

Which option is a valid IPv6 multicast address?

A. fe80::205:8640:471:3200/64

B. ::172.16.0.5/126

C. ff03:365:ba::23

D. ff01:cgfc:345::226:8ff:fee4:bf6f

You must configure your access switch with more than 3000 VLANs and you want the ability to load- balance across them.

Which spanning-tree approach has the least impact on control-plane performance?

A. Configure your access switch with a load-balancing policy and apply it under [edit protocols rstp].

B. Configure your access switch for Rapid-PVST+.

C. Configure your access switch for MSTP, incorporating the use of MSTIs.

D. Configure your access switch for both VSTP and RSTP.

-- Exhibit

-- Exhibit -

Click the Exhibit button.

Referring to the exhibit, what is the correct RPF path toward the multicast source from R6?

A. R6-R5

B. R6-R7-R4-R5

C. R6-R4-R5

D. R6-R4-R3-R2-R5

-- Exhibit -

{master:0}[edit]

user@switch# show ethernet-switching-options voip

interface ge-0/0/16.0 {

vlan phones;

}

{master:0}[edit]

user@switch# show interfaces ge-0/0/16

unit 0 {

family ethernet-switching {

port-mode access;

vlan {

members internet;

}

}

}

{master:0}[edit]

user@switch# show vlans

hr {

vlan-id 513;

}

internet {

vlan-id 15;

}

phones {

vlan-id 25;

}

servers {

vlan-id 30;

}

{master:0}[edit]

user@switch# show interfaces ge-0/0/23

description uplink;

unit 0 {

family ethernet-switching {

port-mode trunk;

vlan {

members [ hr internet ];

}

}

}

-- Exhibit -Click the Exhibit button.

You have recently implemented a Layer 2 network designed to support VoIP. Users have reported that they cannot use their IP phones to make calls.

Based on the switch configuration shown in the exhibit, which command will resolve this issue?

A. set interfaces ge-0/0/23 unit 0 family ethernet-switching vlan members phones

B. set interfaces ge-0/0/16 unit 0 family ethernet-switching port-mode trunk

C. set ethernet-switching-options voip interface ge-0/0/23 vlan phones

D. set vlans phones vlan-id 513

-- Exhibit

-- Exhibit -Click the Exhibit button.

You are asked to configure an OSPF virtual link that connects remote Area 4 to the backbone.

Referring to the exhibit, what are two requirements for an OSPF virtual link to operate correctly? (Choose two.)

A. A virtual link configuration on the ABR between Areas 0 and 1 must include transit area 1.

B. The interface of the transit area must be of type vt.

C. A virtual link configuration on the ABR between Areas 0 and 1 must be the interface address of the neighbor on the far end.

D. A virtual link configuration on the ABR between Areas 0 and 1 must be the router ID (RID) of the neighbor on the far end.

-- 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.

You are attempting to configure an internal BGP peer on a Junos device. However the configuration failed to commit. Which two actions would solve this problem? (Choose two)

A. set the BGP group type to internal

B. set the BGP group peer-as to 65501

C. set the BGP group description to intern

D. set the BGP group peer-as to 65502

You enable the captive portal authentication method on your juniper switch. There is no guest-Vlan configured in this scenario, what will happen when the RADIUS server fails to respond?

A. Access will be allow to only VLAN 4096

B. All access will be allowed

C. Access will be allowed to only VLAN 1

D. Access will not be allowed to any VLAN