DHomesb Practice Final Exam

1	Top of Form What is the default subnet mask for an IP address of 64.100.19.14? 255.0.0.0 255.255.0.0 255.255.255.0 255.255.255.255 Bottom of Form
2	Top of Form A network administrator has been notified that users have experienced problems gaining access to network resources. What utility could be used to directly query a name server for information on a destination domain? ping tracert netstat ipconfig nslookup Bottom of Form

3	Top of Form What does the term "attenuation" mean in data communication? loss of signal strength as distance increases time for a signal to reach its destination leakage of signals from one cable pair to another strengthening of a signal by a networking device Bottom of Form
4	Top of Form What is the function of CSMA/CA on a wireless Ethernet network? to prevent collisions to broadcast messages to select the least congested channel to establish an ACK between devices Bottom of Form

5	Top of Form The area covered by a single AP is known as what? ad-hoc network basic service set independent basic service set extended service set distribution system Bottom of Form
6	Top of Form The help desk at a large packaging company receives a call from a user who is concerned about lost data files on the local PC. The help desk technician learns that the user clicked on an icon that appeared to be a program update, but no updates were scheduled for that program. What type of attack has likely occurred? worm DDoS brute force Trojan horse Bottom of Form

7	Top of Form Which installation option enables a single physical resource to function simultaneously as multiple logical resources? clean install multi-boot upgrade virtualization Bottom of Form
8	Top of Form Which part of the electromagnetic spectrum is commonly used to exchange data between a PDA and a computer? FM radar infrared ultraviolet Bottom of Form

9	Top of Form A company has a web server that must be accessible to both external and internal clients. Which security policy best practice should be followed to maximize security of the server? Place the web server in a DMZ. Keep the web server on the external network. Configure a firewall device to serve as the web server. Locate the web server in the server farm of the internal network. Bottom of Form
10	Top of Form What is specified by the host bits in an IP address? broadcast identity of the network identity of the computer on the network network that is being addressed network to which the host belongs Bottom of Form
11	Top of Form For an IP address, what component decides the number of bits that is used to represent the host ID? default-gateway host number network number subnet mask Bottom of Form
12	Top of Form What advantage does a peer-to-peer network have over a client-server network? It increases security. It increases scalability. It produces a higher performance for hosts. It eliminates the need for centralized administration. Bottom of Form

13	Top of Form Refer to the exhibit. If H4 sends a message to H1 and the destination MAC address is in the MAC table for both Switch1 and Switch2, which host devices will receive the message? only H1 hosts H1 and H4 all hosts that are connected to Switch1 all hosts that are connected to Switch1 and Switch2 Bottom of Form
14	Top of Form Refer to the graphic. Assume that the exhibited output is from a host that is connected to a Linksys integrated router. What is one of the first things you should check? IP address on the host IP address on the router subnet mask on the host default gateway on the host link status LED on the front of the router Bottom of Form

15	Top of Form Which of the following are the address ranges of the private IP addresses? (Choose three.) 10.0.0.0 to 10.255.255.255 200.100.50.0 to 200.100.25.255 150.150.0.0 to 150.150.255.255 172.16.0.0 to 172.31.255.255 192.168.0.0 to 192.168.255.255 127.16.0.0 to 127.31.255.255 Bottom of Form
16	Top of Form When acting as a DHCP server, an integrated router can provide what three types of information to a client? (Choose three.) physical address MAC address default gateway static IP address dynamic IP address DNS server address Bottom of Form

17	Top of Form What is the purpose of spam filter software? It detects and removes spyware. It detects and removes viruses. It prevents the display of advertisement windows. It examines incoming e-mail messages to identify the unsolicited ones. Bottom of Form
18	Top of Form A network engineer wants to represent confidential data in binary format. What are the two possible values that the engineer can use? (Choose two.) 0 1 2 A F Bottom of Form

19	Top of Form Which protocol in its default configuration downloads e-mail messages to the client computer and deletes them from the server? FTP POP3 SMTP IMAP4 Bottom of Form
20	Top of Form Refer to the exhibit. A user on host A sends an e-mail to the user on host B. Which type of message does host A send? broadcast multicast simulcast unicast Bottom of Form
21	Top of Form What are two best practices that are used when configuring a small home WLAN? (Choose two.) the use of EAP the encryption of the SSID the use of pre-shared keys the use of open authentication the disabling of SSID broadcasting Bottom of Form
22	Top of Form What type of message is sent to a specific group of hosts? static unicast dynamic multicast broadcast Bottom of Form

23	Top of Form Refer to the exhibit. Why would a network administrator use the network mode that is shown? to support hosts on different IP networks to support hosts that use different 802.11 standards to support both wireless and wired Ethernet hosts to support hosts with different operating systems to support hosts with network cards from different manufacturers Bottom of Form
24	Top of Form A network technician is required to provide access to the Internet for a large company. What is needed to accomplish this task? ISP private IP addresses for each host static IP addresses for each host DHCP server Bottom of Form

25	Top of Form Which type of computer uses an integrated monitor and keyboard? pocket PC laptop mainframe server workstation Bottom of Form
26	Top of Form Which transport layer protocol is used when an application requires acknowledgment that data has been delivered? FTP TCP UDP RTP SMTP Bottom of Form

27	Top of Form Refer to the exhibit. What cabling fault does the exhibit represent? open reversed pair short split pair Bottom of Form
28	Top of Form Which two statements are true about local applications? (Choose two.) They run on the network. An example of a local application is e-mail. They are accessed from a remote computer. They are stored on the local hard disk. They run on the computer where they are installed. Bottom of Form

29	Top of Form Where do ISPs get the public addresses that they assign to end users? ISPs create the addresses themselves. ISPs are assigned addresses through the RFC. ISPs obtain their addresses automatically. ISPs obtain address blocks from registry organizations. Bottom of Form
30	Top of Form Which two transport layer protocols enable hosts to communicate and transfer data? (Choose two.) DHCP ICMP IP TCP UDP Bottom of Form
31	Top of Form Which part of a data packet is used by a router to determine the destination network? source IP address user data destination IP address control information destination MAC address Bottom of Form
32	Top of Form When terminating UTP cabling, why is it important to untwist only a small amount of each wire pair? minimizes crosstalk makes installation faster ensures wires are in correct order makes it easier to fit wires into connector Bottom of Form

33	Top of Form A learner wants to interact with the operating system of a computer. Which two methods can be used for this? (Choose two.) CLI GUI kernel third party software shell Bottom of Form
34	Top of Form What is the purpose of the ipconfig /release command? It forces a client to give up its current IP address. It forces a client to give up its current MAC address. It forces the client to clear all the MAC address to IP address associations it has learned. It shows the current IP configuration on the client. Bottom of Form

35	Top of Form What is the purpose of creating a DMZ during network firewall implementation? to create a server security zone accessible only to internal clients to create a dirty zone that allows all inbound and outbound traffic to allow for a publicly accessible zone without compromising the internal network to specify a higher security level than normally required for the internal production network Bottom of Form
36	Top of Form A user is unable to send e-mail. While troubleshooting this problem, the network technician first verifies the physical connectivity of cables. Which troubleshooting approach is being followed? bottom-up divide-and-conquer top-down trial and error Bottom of Form

37	Top of Form What is the function of the DNS server? It maps the IP address to the MAC address. It translates a computer or domain name to the associated IP address. It manages the domain that clients are assigned to. It accepts HTTP requests from clients. Bottom of Form
38	Top of Form What layer is the first point of entry for a host into the network? core layer access layer network layer distribution layer Bottom of Form

39	Top of Form Your school network blocks all websites related to online gaming. What type of security policy is being applied? identification and authentication remote access acceptable use incident handling Bottom of Form
40	Top of Form A host sent a message that all other hosts on the switched local network received and processed. What type of domain are all these hosts a part of? local domain multicast domain collision domain broadcast domain Bottom of Form
41	Top of Form What are two examples of storage peripheral devices? (Choose two.) printer flash drive headphones external DVD barcode reader Bottom of Form
42	Top of Form What type of cable would be required to connect a Linksys router to a wired PC? crossover cable rollover cable serial cable straight-through cable Bottom of Form

43	Top of Form Refer to the exhibit. What is the effect of setting the security mode to WEP on the Linksys integrated router? The WEP security mode enables the AP to inform clients of its presence. The WEP security mode encrypts network traffic during transmission between the AP and the wireless client. The WEP security mode generates a dynamic key each time a client establishes a connection with the AP. The WEP security mode identifies the WLAN. Bottom of Form
44	Top of Form In an attempt to verify connectivity, a user issues the ping command to a device that is not on the local network. The ping is unsuccessful. What can be determined from this result? The default gateway is misconfigured. The patch cable on the host station is faulty. The router between the host and destination is faulty. Further troubleshooting will be required to reach a definite conclusion. Bottom of Form

45	Top of Form Which two causes of networking problems are related to the physical layer? (Choose two.) disconnected cables improper operation of cooling fans incorrect MAC address incorrect default gateway incorrect subnet mask Bottom of Form
46	Top of Form What is an advantage of selecting an operating system that has a commercial license over one with a GPL license? The commercial license-based operating system ensures full access to the source code for everyone. The commercial license-based operating system ensures that everyone can participate in the enhancement of the product. The commercial license-based operating system provides structured support. The commercial license-based operating system is released free of charge. Bottom of Form

47	Top of Form Refer to the exhibit. Assume that the command output is from a wireless DHCP client that is connected to a Linksys integrated router. What can be deduced from the output? The DHCP configuration on the router needs to be verified. The WEP key or SSID needs to be verified. The wireless connection is operational. The wireless NIC driver or the NIC itself needs to be reinstalled. Bottom of Form
48	Top of Form Refer to the exhibit. What is the purpose of assigning a network name of College? It enables access to the AP configuration GUI by name rather than by address. It encrypts data between the wireless client and the AP. It identifies the wireless LAN. It translates an internal address or group of addresses to a public address. It translates IP addresses into easy-to-remember domain names. Bottom of Form

49	Top of Form Because of an increasing number of users, bandwidth per user on a WLAN has decreased to a point where users are complaining about poor performance. What can be done to improve the user experience? Increase the AP radio signal strength. Place the AP in a more central location. Deploy an external omni-directional antenna. Reduce the number of devices using each channel. Bottom of Form
50	Top of Form A network technician suspects that malware on a user PC is opening multiple TCP connections to a specific foreign host address. Which Windows command line utility can be used to confirm the multiple TCP connections? ping netstat tracert ipconfig nslookup Bottom of Form

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