Cisco 642-278 Exam Questions

Question 6 of 38

Which encryption algorithm does SRTP utilize?

SEAL

3DES

IPSEC

AES

Correct Answer: D

Question 7 of 38

What is the purpose of route filters?

to reduce the size of the calling search space

to reduce the number of dial peers required

to limit the number of reachable destinations

to reduce the number of route patterns added to the route plan

to block calls to matching route patterns

Correct Answer: C

Question 8 of 38

In a Cisco Unified Communications environment, which four of the following are important IP configurations that are distributed to the endpoint from the DHCP servers? (Choose four.)

IP address

TFTP server

Primary router

Assigned VLAN

DNS server

WINS server

NTP server

HTTP server

Correct Answer: A, B, C, E

Question 9 of 38

Which two of the following accurately describe MGCP? (Choose two.)

supports NFAS

is a master-slave protocol

supports O SIG

Is a binary-based protocol

uses UDP exclusively for faster performance

Correct Answer: B, E

Question 10 of 38

What are four advantages that come from using auxiliary or voice VLANs in a Cisco Unified Communications environment? (Choose four.)

Separates voice and data traffic

Allows connectively between the voice and access VLANs

Enables auto-registration

Prevents unnecessary IP address renumbering

Only a single physical port on the switch

Simplifies QoS configuration

Correct Answer: A, B, E, F