September 2003
Intermediate to advanced
432 pages
8h 53m
English
| Question 1 |
Which well-known network port number does DNS use?
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| A1: | Answer C is correct because DNS uses well-known port number 53 for its network communication. Answer A is incorrect because port 21 is used by ftp. Answer B is incorrect because port 23 is used by telnet. Answer D is incorrect because port 25 is used by smtp for email purposes. |
| Question 2 |
Which signal would you send to the in.named process to turn off debugging?
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| A2: | Answer D is correct because the USR2 signal is sent to the in.named process to turn off debugging. Answer A is incorrect because the HUP signal causes in.named to reread its configuration files. Answer B is incorrect because the USR1 signal increases ... |