JN0-643 Online Practice Questions and Answers

-- Exhibit -[edit]

user@switch# commit

error: Trunk interface can not be member of both dot1q-tunneling enabled vlan , and a non dot1q-tunneled vlan when dot1q-tunneling ethernet-type is not <0x8100> error: configuration check-out failed

-- Exhibit -

Click the Exhibit button.

When you try to commit your 802.1Q tunneling configuration, you receive the error shown in the exhibit.

Which configuration statement will allow the configuration to commit?

A. set vlans cust-1 interface ge-0/0/10 egress

B. set interfaces ge-0/0/10 ether-options mdi-mode auto

C. set vlans v11 dot1q-tunneling customer-vlans native

D. set ethernet-switching-options dot1q-tunneling ether-type 0x8100

A network administrator is configuring CoS on a switch and assigns forwarding classes shown below:

class-of-service {

forwarding-classes {

class best-effort queue-num 0;

class bulk-data queue-num 1;

class critical queue-num 3;

class voice queue-num 6;

class call-signal queue-num 3;

}

}

Based on the configuration, which action prioritizes call-signal traffic over critical traffic?

A. Assign call-signal traffic and critical traffic to different schedulers.

B. Assign call-signal traffic and critical traffic to different scheduler maps.

C. Assign a loss priority of high to the packets in the critical forwarding class and set priority high in the scheduler configuration.

D. Assign a loss priority of high to the packets in the critical forwarding class and configure drop profiles in the scheduler configuration.

You must troubleshoot a CoS issue on an Ethernet interface which has been observed to drop packets in the best effort queue. You must determine whether the dropped packets are tail drops.

Which CLI command output accomplishes this task?

A. show class-of-service interface

B. show interfaces queue

C. show interfaces extensive

D. show class-of-service forwarding-class best-effort

You are troubleshooting a problem on interface ge-0/0/3.

Which command shows statistics in real time?

A. show interfaces statistics

B. monitor interface statistics ge-0/0/3

C. monitor interface traffic

D. monitor traffic interface ge-0/0/3

-- Exhibit -- Exhibit -

Click the Exhibit button.

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

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

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

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

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

You have certainly implemented the configuration shown in the exhibit. After committing these changes, the community devices connected to AS1 are not able to communicate with the appropriate community devices connected to AS2. What must be done to allow these community devices to communicate?

A. You must configure an isolation VLAN ID under the pvlan 200 on the AS 2 switch

B. You must configure the ge 0/0/10 interface as AS1 as the pvlan trunk

C. You must configure an isolation VLAN ID under the pvlan 200 on both the switches

D. You must configure the ge 0/012 interface on both switches as pvlan trunks

Your device receives the route 10.1.10/24 from all four of the destinations shown in the exhibit. In this scenario, which route would be active in the routing table?

A. the route from 192.168.100.1

B. the route from 172.16.4.2

C. the route from 172.17.4.2

D. the route from 192.168.100.2

When traffic is classified on an EX Series switch, which statement is true?

A. With the default classifier rules applied, voice and video traffic receive their own queues to avoid congestion

B. With the default classifier, rules applied all traffic that enters an access port is classified as best effort

C. With the default classifier rules applied, voice traffic is classified as expedited forwarding on trunk ports

D. If no classifier rules are applied, class of service bits are automatically rewritten on egress to match the class of service assigned on ingress