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New Cisco 200-125 Exam Dumps Collection (Question 16 - Question 24)

Question No: 16

Which command can you enter to determine whether serial interface 0/2/0 has been configured using HDLC encapsulation?

A. router#show platform

B. router#show interfaces Serial 0/2/0

C. router#show ip interface s0/2/0

D. router#\\show ip interface brief

Answer: C


Question No: 17

Which two passwords must be supplied in order to connect by Telnet to a properly secured Cisco switch and make changes to the device configuration? (Choose two.)

A. tty password

B. enable secret password

C. vty password

D. aux password

E. console password

F. username password

Answer: B,C

Explanation:

Telnet presents a potential security risk, so Telnet uses vty for connecting a remote Cisco switch. For access security, the vty password and enable password must be configured.


Question No: 18

Which statement about QoS default behavior is true?

A. Ports are untrusted by default.

B. VoIP traffic is passed without being tagged.

C. Video traffic is passed with a well-known DSCP value of 46.

D. Packets are classified internally with an environment.

E. Packets that arrive with a tag are untagged at the edge of an administrative domain.

Answer: E

Explanation: Frames received from users in the administratively-defined VLANs are classified or tagged for transmission to other devices. Based on rules that you define, a unique identifier (the tag) is inserted in each frame header before it is forwarded. The tag is examined and understood by each device before any broadcasts or transmissions to other switches, routers, or end stations. When the frame reaches the last switch or router, the tag is removed before the frame is sent to the target end station. VLANs that are assigned on trunk or access ports without identification or a tag are called native or untagged frames. For IEEE 802.1Q frames with tag information, the priority value from the header frame is used. For native frames, the default priority of the input port is used.

Each port on the switch has a single receive queue buffer (the ingress port) for incoming traffic. When an untagged frame arrives, it is assigned the value of the port as its port default priority. You assign this value by using the CLI or CMS. A tagged frame continues to use its assigned CoS value when it passes through the ingress port.


Question No: 19

Which identification number is valid for an extended ACL?

A. 1

B. 64

C. 99

D. 100

E. 299

F. 1099

Answer: D


Question No: 20

Which NAT function can map multiple inside addresses to a single outside address?

A. PAT

B. SFTP

C. RARP

D. ARP

E. TFTP

Answer: A


Question No: 21

Which method does a connected trunk port use to tag VLAN traffic?

A. IEEE 802 1w

B. IEEE 802 1D

C. IEEE 802 1Q

D. IEEE 802 1p

Answer: C

Explanation:

http://www.cisco.com/c/en/us/support/docs/lan-switching/8021q/17056-741-4.html


Question No: 22

Which interface counter can you use to diagnose a duplex mismatch problem?

A. no earner

B. late collisions

C. giants

D. CRC errors

E. deferred

F. runts

Answer: B


Question No: 23

Which NTP command configures the local device as an NTP reference clock source?

A. ntp peer

B. ntp broadcast

C. ntp master

D. ntp server

Answer: D


Question No: 24

Which statement about native VLAN traffic is true?

A. Cisco Discovery Protocol traffic travels on the native VLAN by default

B. Traffic on the native VLAN is tagged with 1 by default

C. Control plane traffic is blocked on the native VLAN.

D. The native VLAN is typically disabled for security reasons

Answer: B


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