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249. If you type cl at a router prompt and receive an ambiguous command, which command should you type
next?
A. Help
B. ?
C. cl ?
D. cl?
Answer: D
By typing a question mark ? immediately following the ambiguous command the router will display all commands that match that string of
characters.
Chapter: 5
250. What type of flow control does TCP use?
A. Stop and wait B. Windowing
C. Source quenching D. TCP does not handle flow control
Answer: B
TCP negotiates a window size during the initial connection process. The window size can be adjusted and
its value is contained in the TCP header.
Chapter: 5
251. What access-list command is used under the line vty 0 4 to prevent unwanted telnet connections?
A. Access-group <number> <in | out>
B. Distribution-list <number> <in | out> C. Access-class <number> <in | out>
D. Map-class <number> <in | out>
Answer: C
To apply an access-list to the VTY ports you use the access-class command at the line configuration mode.
Chapter: 6