Testpassport TT0-201 题库

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1. Which of the following is a concern when implementing IPsec for SIP-based voice calls behind a

firewall that implements Network Address Translation (NAT)?

A.IPsec doesn't natively support SIP.

B.Encryption causes increased overhead.

C.You must implement tunnel mode using the AH security protocol.

D.You must implement transport mode using the AH security protocol.

Answer: B

2. Which of the following describes how the host portion of IPv4 and IPv6 addresses are created?

A.All IPv4 and Ipv6 host addresses are determined by ICANN.

B.All IPv4 and IPv6 host addresses are based on the host's MAC address.

C.The host portion of an IPv4 address is determined by ICANN. The host portion of an IPv6 address is

determined according to the multicast address.

D.The host portion of an IPv4 address is determined arbitrarily according to the value of the subnet mask.

The host portion of an IPv6 address is determined from the host's MAC address.

Answer: D

3. You have been given the following in CIDR notation: 152.2.100.1/25. How many subnets can you

create, and how many IP addresses can each subnet have?

A.55 subnets, with 1024 addresses per subnet

B.126 subnets, with 512 addresses per subnet

C.128 subnets, with 126 addresses per subnet

D.1024 subnets, with 55 addresses per subnet

Answer: C

4. You have decided to use the following range of IP addresses:

172.16.0.0/24

Which of the following will allow you to avoid deploying NAT traversal workarounds?

A.Deploy a STUN server.

B.Deploy a Session Border Controller (SBC).

C.Use registered IP addresses for all devices.

D.Use the default subnet mask for your IP address range.

Answer: C

5. You have implemented DiffServ to describe a collection of service policies that determine how your

network equipment will classify and condition voice data in a traffic flow scheme. What is the accepted

name for this group?

A.Class

B.Group

C.VLAN

D.Domain

Answer: D

6. You have been asked to recommend an appropriate network bandwidth for a medium to large business.

This business will use it for their IP phones, as well as their data connection. Which of the following would

you recommend?

A.DS0

B.DS1

C.ISDN BRI

D.ISDN PRI

Answer: D

7. You are helping design an SIP implementation for an existing network. Which of the following is the

most important element to verify?

A.Whether or not the company uses fire-grade cabling.

B.Whether or not the company has implemented QoS.

C.Whether or not the company Web server supports SSL.

D.Whether or not the company layer 2 switches have fault tolerance in place.

Answer: B

8. Your customer has asked you to enable fax messages to be delivered to her computer so she can read

it in her e-mail. Which protocol should you implement on your convergence device?

A.T.30

B.T.34

C.T.37

D.T.38

Answer: C

9. Which protocol does is generally used to establish calls in SIP implementations?

A.TCP

B.UDP

C.RTP

D.H.225

Answer: B

10. Which of the following connects the Foreign Exchange Station (FXS) portion of an Analog Telephone

Adapter (ATA) to an analog phone?

A.USB connector.

B.RJ-11 connector.

C.RJ-45 connector.

D.RS-232 connector.

Answer: B
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