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Table Of Contents  CertiGuide to Network+
 9  Appendix A: Answers to Success Questions and Real World Exam Questions

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Chapter 0110: NOS Anatomy Answers
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Chapter 1000: Security in the Real World Answers
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Chapter 0111: Wide Area Networking Answers

1. What type of device is used to connect an external digital signal to an in-house line?

A. V.35 Connector

B. Modem

C. Transceiver

D. DSU/CSU

E. Brouter

Explanation: A DSU/CSU (Digital Service Unit/Channel Service Unit) connects an external digital circuit to an internal line and can be configured to use channels for both voice and data.

& Domain 1.6: Identify the purpose, features, and functions of following network components: hubs, switches, bridges, routers, gateways, and CSU/DSU, never to raise car/ISDN adapter/Network Interface cards, wireless access points, modems.


 

2. The definition of a WAN or Wide Area Network is:

A. Network consisting of multiple server computers that have specific functions

B. Communication system within one office

C. Multiple workgroups connected in the same building

D. Network that utilizes repeaters to enhance the signal over great distances

E. Communications network that connects multiple geographic sites together

Explanation: A Wide Area Network (WAN) is a communications network that connects two or more sites over wide geographic areas such as states or countries. Most WANs are connected point-to-point via a physical line owned or leased by a private company, or by switched telephone technology where data is transported over the public telephone network.

& Domain 2.11: Identify the basic characteristics of the following WAN technologies': packet vs. circuit switching, ISDN, FDDI, ATM, frame relay.


 

3. Remote node technology is a good solution when remote users need data from their office systems, as long as they have applications loaded on their laptops.

A. True

B. False

Explanation: Remote node allows remote client systems to access resources on the host as long as the clients have proper software installed.

& Domain 2.12: Define the functions of the following remote access protocols and services: RAS, PPP, PPTP, ICA.


 

4. What is the major road block to providing full digital service over POTS?

A. The "last mile" of telephone cable is still copper

B. Competition isn't strong enough to warrant full digital service

C. Fiber optic lines can not be brought out to rural areas

D. It is too expensive for the telephone companies to implement

Explanation: The "last mile" from the telephone company's central office to your home or office is typically copper cable that prevents high-speed digital access.

& Domain 2.11: Identify the basic characteristics (e.g., speed capacity, Media) of the following WAN technologies: packet switching vs. circuit switching, ISDN, FDDI, ATM, frame relay, Sonet/SDH, T1/E1, T3/E3, Ocx.


 

5. Which dial-up protocol is considered self-configuring?

A. SLIP

B. PPP

C. TCP/IP

D. POTS

E. xDSL

Explanation: The Point-to-Point (PPP) protocol implements self configuration through a negotiation mechanism, where each end of the link describes to the other its capabilities and requirements.

& Domain 2.12: Define the functions of the following remote access protocols and services: RAS, PPP, PPTP, ICA.


 

6. Identify the Bogus (incorrect) statement(s) concerning the SLIP protocol.

A. Supports high speed connections

B. Supports multiple protocols (such as IXP & TCP/IP)

C. Operates with analog or digital connections

D. Error detection/correction

E. Easy to implement

Explanation: SLIP (Serial Line Internet Protocol) is quite old, and it is rare to find its implementation the modern world.

& Domain 2.12: Define the function of the following remote access protocols and services, RAS, PPP, PPTP, ICA


 

7. Packet routing can occur in several forms. From the choices below, choose the one that has the most overhead.

A. Circular

B. Static

C. Dynamic

D. Logical

E. No choice is correct

Explanation: The correct choice is dynamic routing. This is because dynamic routing is automatic. Applying changes requires use of resources. Contrast this to static routing, which is a lookup table that must be updated manually.

Routing is a logical decision event, regardless of the type of routing administration. This makes the choice logical a nice try, and incorrect. By default, no choice is correct" an invalid answer.

& Domain 2.11: Identify the basic characteristics (e.g., speed capacity, Media) of the following WAN technologies: packet switching vs. circuit switching, ISDN, FDDI, ATM, frame relay, Sonet/SDH, T1/E1, T3/E3, Ocx.


 

8. You are the administrator of a large company with several remote field offices. You are required to configure support for the remote offices at the company headquarters.

Optionally, the connection from the field offices is always on and secure.

Proposed Solution:

  • Configure a RAS (Remote Access Server) with a V.90 modem utilizing PPTP at the main office.

This proposed solution:

A. Meets the required and both desired features

B. Meets the required and one of the desired features

C. Meets the required and none of the desired features

D. Meets neither the required or the desired features

E. Meets one of the desired features and not the required feature

Explanation: The proposed solution allows for remote offices to contact the main office by using a remote access server with the RAS service installed. Therefore, the required solution is met.

The desired solution for security is accomplished by using PPTP (Point to Point Tunneling Protocol). The second desired solution is not met because a 56K (V.90) modem has been installed, which requires dialing in via the PSTN (Public Switched Telephone Network) to establish a connection, which is not a dedicated solution.

& Domain 2.12: Define the functions of the following remote access protocols and services: RAS, PPP, PPTP, ICA.

& Domain 3.7: Given a remote connectivity scenario (e.g., IP, IPX, dial-up, PPPoE, authentication, physical connectivity etc.), configure the connection.


 

9. ATM combines the best of ____________ switching and __________ switching.

A. Circuit, packet

B. Ethernet, Token Ring

C. Cell, packet

D. Broadband, baseband

E. Network, Application

Explanation: ATM creates a fixed channel, like circuit switching, for data delivery. However, it uses fixed length packets, which is similar to packet switching.

& Domain 2.11: Identify the basic characteristics (e.g., speed capacity, Media) of the following WAN technologies: packet switching vs. circuit switching, ISDN, FDDI, ATM, frame relay, Sonet/SDH, T1/E1, T3/E3, Ocx.


 

10. ICA is an abbreviation for

A. Independent Computing Architecture

B. Industry Computing Communications

C. Internal Communications Classification

D. Internal Control Computing

Explanation: Independent Computing Architecture was developed by Citrix and contains a server software component, a network control component, and a client software component. ICA executes 100% of the logic running in an application on the server.

& Domain 2.12: Define the functions of the following remote access protocols and services: RAS, PPP, PPTP, ICA.


 

11. Which adapter chipset is most commonly emulated by manufacturers, and drivers for which are a good choice when supplied NIC drivers fail?

A. NE2000

B. NIC2000

C. Ethernet

D. BUS

E. 3COM

Explanation: The NE2000 NIC chipset is supplied by most manufacturers, and drivers for it are considered "generic" LAN drivers.

& Domain 3.1: Identify the basic capabilities (i.e., client support, interoperability, authentication, file and print services, application support, and Security: Unix/Linux, NetWare, Windows, Macintosh.

& Domain 3.2: Identify the basic capabilities of client workstations (i.e., client connectivity, local security mechanisms, and authentication).


 

12. The protocol used to sign on and off some DSL connections is called:

A. PPP

B. ATM

C. PPPoE

D. FTP

E. SNMP

Explanation: PPPoE (PPP Over Ethernet) is used by some ISPs to control DSL connections. It allows ISPs to authenticate users and track user activity. This is useful for statistical and/or billing purposes.

& Domain 3.7: Given a remote connectivity scenario (e.g., IP, IPX, dial-up, PPPoE, authentication, physical connectivity etc.), configure the connection.


 

13. Before connecting modems to the telephone system, always:

A. Verify that the wall jack is within 15 feet of the modem

B. Verify that the wall jack supports dual lines if a telephone will also be used

C. Use a Y splitter on a remote FAX line

D. Verify that the wall connection for the modem line is analog

E. Plug the modem telephone line into an electrical surge protection device

Explanation: While it is a good idea to use a surge protection device on the modem line(s), it is necessary to first make sure that the connection is analog and not digital, which is common in many businesses.

& Domain 4.2: Given a troubleshooting scenario involving a small Office/Home Office network failure (e.g., xDSL, cable, home satellite, wireless, POTS) identify the cause the problem.


 

14. You set up a dial-up network (DUN) connection using the SLIP protocol. You can not transfer files with FTP and have problems connecting to the Internet. What would be one possible alternative to SLIP?

A. Install a proxy server with TCP/IP

B. Try pinging the FTP server

C. Try pinging the local host

D. Switch to the PPP protocol

E. Switch to a DSL (Digital Subscriber Line)

Explanation: Of the choices presented, only PPP is an alternative to SLIP. SLIP is an older protocol and is not used much anymore. Microsoft Windows RAS and RRAS have not supported SLIP since NT4, which was released in 1994. Microsoft still includes SLIP as a client option, however, to provide connectivity with legacy systems.

Installing a Proxy with TCP/IP would not solve the problem, because the Proxy would still need to make the connection using SLIP. Pinging the FTP server would only tell you if you can 'see' it. Pinging the localhost (127.x.y.z) would only tell you if TCP/IP is functioning. Switching to DSL would only change your access method, but not necessarily your connection protocol.

& Domain 4.3: Given a troubleshooting scenario involving a remote connectivity problem (e.g., authentication failure, Protocol configuration, physical connectivity) identify the cause a problem.


Previous Topic/Section
Chapter 0110: NOS Anatomy Answers
Previous Page
Pages in Current Topic/Section
1
Next Page
Chapter 1000: Security in the Real World Answers
Next Topic/Section

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