Network Devices and Troubleshooting - Quiz Explanation
The correct answers are indicated below, along with text that explains the correct answers.
1.
Which network device blocks a specific type of data?
Please select the best answer.
A.
Bridge
B.
Gateway
C.
Firewall
D.
Hub
The correct answer is C.
A firewall is used to prevent malicious entities from infiltrating a network by blocking out a specific type of data. Answer A is incorrect because a bridge is used to segment one network into two segments thus isolating traffic. Answer B is incorrect because a gateway is used as a translator between networks using incompatible communications protocols. Answer D is incorrect because a hub interconnects multiple devices in a network.
2.
Which type of server is used to convert domain names into IP addresses?
Please select the best answer.
A.
Translation server
B.
An FTP server
C.
A file server
D.
A DNS
The correct answer is D.
A
D
omain
N
ame
S
erver uses a lookup-table to convert an alpha name (like Amazon.com) to its numeric IP address (example: 231.221.445.7). Answer B is wrong because there is no such thing as a translation server. Answer C is wrong because FTP servers facilitate file distribution over the Internet. Answer C is wrong because a file server facilitates file distribution generally over a LAN.
3.
From your home computer you have noticed its taking an unusually long time to access a particular Web site (say Yahoo.com). You're not sure if it's your ISP, Yahoo's server(s), or maybe there are a lot of people on the Internet right now. Which diagnostic tool is best for you to use in detecting where the slowdown might be occurring?
Please select the best answer.
A.
Network analyzer
B.
ARP
C.
PING
D.
Tracert
The correct answer is D.
Tracert is used to show routing and delay times for each hop to the destination site. Through this information, one can determine where the slowdown is occurring. Answer A is incorrect because the network analyzer is exclusively designed to monitor traffic statistics on a network (LAN) and, therefore, only handles LAN related problems. Answer B is incorrect because ARP is used primarily to display the contents of the Address Resolution Protocol table. Answer C is incorrect because PING is used to see if a remote host can be reached from a specific computer, not where a slow down along the way may be occurring.
