chapter 6

Question 1

1. Which two protocols can be used to encapsulate traffic that is traversing a VPN tunnel? (Choose two.)

Answer 1

IPsec

PPTP

Question 2

2. What are the three main functions of a secure VPN? (Choose three.)

Answer 2

authentication
data confidentiality
data integrity

Question 3

Data confidentiality through a VPN can be enhanced through the use of which three encryption protocols? (Choose three.)

Answer 3

AES
DES
RSA

Question 4

While monitoring traffic on a cable network, a technician notes that data is being transmitted at 38 MHz. Which statement describes the situation observed by the technician?

Answer 4

Data is being transmitted from the subscriber to the headend.

Question 5

Which two statements are valid solutions for a cable ISP to reduce congestion for users? (Choose two.)

Answer 5

allocate an additional channel

subdivide the network to reduce users on each segment

Question 6

Data confidentiality through a VPN is achieved through which two methods? (Choose two.)

Answer 6

encryption

encapsulation

Question 7

What two protocols provide data authentication and integrity for IPsec? (Choose two.)

Answer 7

AH

ESP

Question 8

Which two methods could an administrator use to authenticate users on a remote access VPN? (Choose two.)

Answer 8

digital certificates

smart cards

Question 9

Which is an example of symmetric-key encryption?

Answer 9

pre-shared key

Question 10

Refer to the exhibit. A teleworker is connected over the Internet to the HQ Office. What type of secure connection can be established between the teleworker and the HQ Office?

Answer 10

a remote-access VPN

Question 11

After conducting research to learn about common remote connection options for teleworkers, a network administrator has decided to implement remote access over broadband to establish VPN connections over the public Internet. What is the result of this solution?

Answer 11

The connection has increased security and reliable connectivity. Users need a remote VPN router or VPN client software.

Question 12

Which two statements about DSL are true? (Choose two.)

Answer 12

local loop can be up to 3.5 miles (5.5km)

user connections are aggregated at a DSLAM located at the CO

Question 13

A company is using WiMAX to provide access for teleworkers. What home equipment must the company provide at the teleworker’s site?

Answer 13

a WiMAX receiver

Question 14

A technician has been asked to configure a broadband connection for a teleworker. The technician has been instructed that all uploads and downloads for the connection must use existing phone lines. Which broadband technology should be used?

Answer 14

DSL

Question 15

Which two Layer 1 requirements are outlined in the Data-over-Cable Service Interface Specification (DOCSIS)? (Choose two.)

Answer 15

channel widths

modulation techniques

Question 16

Refer to the exhibit. All users have a legitimate purpose and the necessary permissions to access the Corporate network. Based on the topology shown, which locations are able to establish VPN connectivity with the Corporate network?

Answer 16

All locations can support VPN connectivity.

Question 17

Which two features can be associated with the Worldwide Interoperability for Microwave Access (WiMAX) telecommunication technology? (Choose two.)

Answer 17

covers areas as large as 7,500 square kilometers

connects directly to the Internet through high-bandwidth connections

Question 18

Refer to the exhibit. A VPN tunnel has been established between the HQ Office and the Branch Office over the public Internet. Which three mechanisms are required by the devices on each end of the VPN tunnel to protect the data from being intercepted and modified? (Choose three.)

Answer 18

The two parties must establish a secret key used by encryption and hash algorithms.
The two parties must agree on the encryption algorithm to be used over the VPN tunnel.
The devices must be authenticated before the communication path is considered secure.

Question 19

Which statement describes cable?

Answer 19

Delivering services over a cable network requires downstream frequencies in the 50 to 860 MHz range, and upstream frequencies in the 5 to 42 MHz range.