Review Questions | Network+ Study Guide

1.	As part of your daily duties, you are configuring a workstation to connect to your ISP. Already installed are a web browser, client-side FTP, and a dial-up networking connection using SLIP. A remote DHCP server will assign an IP address automatically. When you dial and connect, you are unable to browse the Internet. Upon further investigation, you find you also cannot retrieve files from an FTP site. The results that you want require that you are able to browse the Internet and access FTP files. You, therefore, configure the TCP/IP client so that IP addresses are assigned by a DHCP server. This solution achieves which of the following? Both required results Only one of the required results Neither of the required results
2.	As part of your daily duties, you are configuring a workstation to connect to your ISP. Already installed are a web browser, client-side FTP, and a dial-up networking connection using SLIP. A remote DHCP server will assign an IP address automatically. When you dial and connect, you are unable to browse the Internet. Upon further investigation, you find you also cannot retrieve files from an FTP site. The results that you want require that you can browse the Internet and access FTP files. Therefore, you change the dial-up connection protocol to PPP. This solution achieves which of the following? Both required results Only one of the required results Neither of the required results
3.	Your CEO read in a popular magazine that it is possible to reduce remote access connection costs by using the Internet as a WAN. You already have a connection from the head office to the Internet. The CEO requires that you provide a connection from the remote office to headquarters over the Internet. Optionally, both a dial-up connection to the Internet and a secure connection over the Internet for Road Warriors are required. The proposed solution is to install PPTP over a dial-up connection from the remote office to the local ISP. This solution achieves which of the following? 340 The required result only The required and one of the optional results The required and both of the optional results Does not meet the required result
4.	Which transport protocol does PPTP use? IPX/SPX SNA AppleTalk TCP/IP
5.	Which of the following is the greatest advantage of PSTN (POTS)? Readily available Greater than 64Kbps data rates Fault tolerant Not available in all markets
6.	Which of the following is an advantage of ISDN? Readily available Easy to configure Least expensive implementation Greater than 64Kbps possible
7.	Which WAN technology uses digital signaling from sender to receiver? X.25 POTS X2 Kflex T-series
8.	The UART in your PC is an 8250. You have installed an external ISDN Terminal Adapter on your computer. You are not getting the full speed of an ISDN line. You must replace the UART with which chip set? 8550 11500 12550 16550
9.	You require which of the following components for a remote, asynchronous connection? Keyboard Modem Mouse Monitor
10.	What must be set on an internal modem to use it in a PC? (Choose all that apply.) COM port I/O address DMA Channel IRQ
11.	You bought a Windows 98 computer by mail order. You can see that the modem is installed because you have plugged a phone line into the RJ-11 modem jack. Everything else has worked from the first time you plugged in the modem, but the modem fails to respond. What should you check next? Device Manager Explorer The vendor’s website The Start menu
12.	You have a server with two external modems. The modems work one at a time but not together. COM 1 is set to IRQ 4, I/O 3F8h. COM 2 is configured for IRQ 3, I/O 3F8h. What should you do to ensure that both modems work simultaneously? Change the IRQ of modem 1 Change the I/O address of COM 2 Change the IRQ of modem 2 Change the COM port of modem 2
13.	Which of the following protocols works at both the Physical and Data Link layers of the OSI? SLIP PPP TCP/IP
14.	You are setting up a remote workstation for remote access to the office. The office has a modem pool configured, and it is working correctly. The required results are that the remote workstation and modem bank must establish a connection and that the server at the office must authenticate the workstation. Optionally, the workstation and office must be able to communicate by using a single protocol, and the workstation must be able to access all network devices at the office. The proposed solution is to install a POTS telephone line, modem cable, and modem at the workstation. NetBEUI is installed and configured on the workstation. TCP/IP and IPX are installed and configured on the office server. You configure the software settings on the modem. You dial into your headquarters. The appropriate modem lights turn on, and you hear a connection tone from the speaker of the workstation modem. The office network is set up to allow the entire network to be accessed via a dial-in connection. The proposed solution meets which of the following? The required results The required results and one of the optional results The required results and both of the optional results Neither the required nor the optional results
15.	You are setting up a workstation for remote access to the office. The office has a modem pool configured, and it is working correctly. The required results are that the workstation and modem bank must establish a connection and that the server at the office must authenticate the workstation. Optionally, the workstation and office must be able to communicate by using a single protocol, and the workstation must be able to access all network devices at the office. The proposed solution is to install a POTS telephone line, modem cable, and modem connected to the workstation. TCP/IP is installed and configured on the workstation. TCP/IP with DHCP, as well as IPX, are installed and configured on the office server. You configure the software settings on the modem. You dial into your headquarters. The appropriate modem lights turn on, and you hear a connection tone from the speaker of the workstation modem. The office network is set up to allow the entire network to be viewed via dial-in. The proposed solution achieves which of the following? The required results The required results and one of the optional results The required results and both of the optional results Does not meet the required results
16.	You are setting up a workstation for remote access to the office. The office has a modem pool configured, and it is working correctly. The required results are that the workstation and modem bank must establish a connection and that the server at the office must authenticate the workstation. Optionally, the workstation and office must be able to communicate by using a single protocol, and the workstation must be able to access all network devices at the office. The proposed solution is to install a POTS telephone line, modem cable, and modem connected to the workstation. TCP/IP is installed and configured to have a DHCP server automatically assign an IP address. TCP/IP and IP routing are installed and configured on the office server. You configure the software settings on the modem. You dial into your headquarters. The appropriate modem lights turn on, and you hear a connection tone from the speaker of the workstation modem. The office network is set up to allow the entire network to be viewed via dial-in. The proposed solution achieves which of the following? 344 The required results The required results and one of the optional results The required results and both of the optional results Does not meet the required results
17.	You want to order analog ISDN. You call around and can’t seem to find the equipment you want. What could be the possible reason for this? Everyone is out of stock because of unexpected customer demand. ISDN equipment is only available in PC card format. You must order this with external termination. You can’t order analog ISDN.
18.	Which remote access protocol can run over both serial and parallel connections? PPP SLIP X.25
19.	What is the Microsoft TCP/IP protocol that can be used over the Internet to create a secure virtual network? SLIP PPTP TCP HTTP
20.	What is the standard I/O port of COM 3? 2E8 2F8 3E8 3F8

Answers

1.	C. Because SLIP does not support DHCP, you won’t be able to receive an IP address over the dial-up connection. In order to resolve this situation, you must configure PPP as your dial-up protocol and configure that station to use DHCP to get its IP address.
2.	A. As discussed in the last question, you can achieve both required results by configuring the workstation to use PPP instead of SLIP, because PPP supports DHCP and SLIP does not.
3.	A. By using PPTP to only the ISP, you are providing a secure connection just between your company and the ISP. Because the required result is to establish an Internet connection from the remote office to HQ, you’ve done that by connecting your remote network to the Internet. To provide a secure connection between HQ and the remote office (one of the optional results), you would have to install PPTP on the connection between HQ and HQ’s ISP.
4.	D. The point-to-point tunneling protocol uses TCP/IP as a transport.
5.	A. The major advantage to the Public Switched Telephone Network (or the plain old telephone service) is that it is readily available in almost every part of the world.
6.	D. Of the advantages listed, the one most often associated with ISDN is the higher bandwidth available.
7.	E. The T-series of WAN connection (such as T1, T3, and so on) uses digital signaling completely from sending hardware to receiving hardware.
8.	D. For the serial buffers to keep up with the high bandwidth of ISDN connections, you must have a 16-bit UART on the serial port that the Terminal Adapter is connected to. The only fully 16-bit UART listed is the 16550.
9.	B. Although a keyboard, a mouse, and a monitor are required for browsing the Web, the only one absolutely required for a remote, asynchronous connection is a modem.
10.	A, B, D. When you install an internal modem into a PC, the COM port, I/O address, and IRQ must be set. This is done either manually, as in the case of most ISA cards, or automatically, as in the case of PCI.
11.	A. Device Manager is the built-in utility for Windows 98 that shows whether or not a particular device is installed correctly.
12.	B. The I/O addresses of both modems are conflicting, as they are both set to the same I/O address. If you change the I/O address of COM 2, both modems will work at the same time.
13.	A. The SLIP protocol specifies both a Data Link portion and a Physical portion. The Physical portion specifies that the protocol will work only over a serial link.
14.	D. The workstation is only running NetBEUI, and the servers are running TCP/IP and IPX. Because the workstation and server are running separate protocols, they can’t communicate. Thus, neither the required nor the optional results can be achieved since both fundamentally have to do with the workstation and server communicating.
15.	B. This question is similar to question #14; however, in this case, the protocols match. Because the server and workstation are both running the same protocol (TCP/IP) and there is a connection between them, they can both communicate.
16.	C. In exactly the same situation as question #15, both the workstation and the server are running the same protocol and the server has IP routing installed. Thus, the workstation can communicate with the server over the POTS line. And because routing is installed, the workstation can communicate with the entire network.
17.	D. ISDN is a digital services network. There is no such thing as analog ISDN.
18.	A. Because PPP doesn’t contain a Physical layer specification as part of the protocol, it can run over any kind of medium.
19.	B. The Point-to-Point Tunneling Protocol (PPTP) allows you to create a secure virtual connection between two points by tunneling one protocol inside another. Usually, a PPP connection is opened over a TCP/IP link.
20.	C. Every COM port is assigned a default I/O port. The default I/O port of COM 3 is 3E8.