Section 6.2 – Flashcards
15 test answers
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Which port number is used by SNMP?
answer
161
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Which of the following ports does FTP use to establish sessions and manage traffic?
answer
20, 21
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Using the Netstat command you notice that a remote system has made a connection to your Windows server 2003 system using TCP/IP port 21. Which of the following actions is the remote system most likely to be performing ?
answer
Downloading a file
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To increase security on your company's internal network, the administrator has disabled as many ports as possible. Now, however, though you can browse the Internet, you are unable to perform some secure credit card transactions.
answer
443
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question
Which of the following network services or protocols uses TCP/IP port 22?
answer
SSH
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question
Matching ports to associated services
answer
SNMP = 161 TCP and UDP SSH = 22 TCP and UDP TFTP = 69 UDP SCP = 22 TCp and UDP Telnet = 23 TCP HTTPS = 443 TCP and UDP HTTP = 80 TCP FTP = 20 TCP SMTP = 25 TCP POP3 = 110 TCP
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Which of the following lists accurately describes TCP and UDP?
answer
TCP: connection-oriented, reliable, sequenced, high overhead UDP: connectionless, unreliable, unsequenced, low overhead
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You are an application developer creating applications for a wide variety of customers. In which two of the following situations would you select a connectionless protocol?(Select 2)
answer
A gaming company wants to create a networded version fo its latest game AND A company connects two networks through an expensive WAN link. The communication media is reliable, but very expensive. They want to minimize connection times.
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You want to maintain tight security on your internal network so you restrict access to the network through certain port numbers. If you want to allow users to continue to use DNS, which port should you enable?
answer
53
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Your company's network provides HTTP, HTTPS, and SSH access to remote employees. Which ports must be opened on the firewall to allow this traffic to pass?
answer
80, 443, 22
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Your network recently experienced a series of attacks at the Telnet and FTP services. You have rewritten the security policy to abolish the unsecured services, and now you must secure the network using your firewall and routers. Which ports must be closed to prevent traffic directed to these two services?
answer
23, 21
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