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Appendix A
Practice Exam
21.
What can be determined from the following lines of a packet decode?
(Choose all that apply.)
TCP - Transport Control Protocol
Source Port: 1038 [34-35]
Destination Port: 21 FTP Control - File Transfer
Protocol [36-37]
Sequence Number: 6198340 [38-41]
Ack Number: 0 [42-45]
Offset: 7 [46 Mask 0xf0]
Reserved: %000000 [46 Mask 0xfc0]
Code: %000010 [47 Mask 0x3f]
Synch Sequence
Window: 8192 [48-49]
Checksum: 0x2bb5 [50-51]
Urgent Pointer: 0 [52-53]
A.
This is an FTP packet.
B.
The transfer is occurring on port 21.
C.
The packet is out of sequence.
D.
All of the above.
22.
Which of the following can cause a Token Ring interface to not
function? (Choose all that apply.)
A.
Ring speed mismatch
B.
Lobe wire fault
C.
Too many tokens on the ring at one time
D.
All of the above
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