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- LPIC-1 Linux Administrator 102
41.
Which types of network hardware does Linux support? (Select three.)
- A.Token Ring
- B.Ethernet
- C.DHCP
- D.NetBEUI
- E.Fibre Channel
- Answer & Explanation
- Report
Answer : [A, B, E]
Explanation :
Explanation :
| Ethernet (option B) is currently the most common type of wired network hardware for local networks. Linux supports it very well, and Linux also includes support for Token Ring (option A) and Fibre Channel (option E) network hardware. DHCP (option C) is a protocol used to obtain a TCP/IP configuration over a TCP/IP network. It’s not a type of network hardware, but it can be used over hardware that supports TCP/IP. NetBEUI (option D) is a network stack that can be used instead of or in addition to TCP/IP over various types of network hardware. Linux doesn’t support NetBEUI directly. |
42.
Which of the following is a valid IPv4 address for a single computer on a TCP/IP network?
- A.202.9.257.33
- B.63.63.63.63
- C.107.29.5.3.2
- D.98.7.104.0/24
- E.255.255.255.255
- Answer & Explanation
- Report
Answer : [B]
Explanation :
Explanation :
| IP addresses consist of four 1-byte numbers (0–255). They’re normally expressed in base 10 and separated by periods. 63.63.63.63 meets these criteria, so option B is correct. 202.9.257.33 includes one value (257) that’s not a 1-byte number, so option A is incorrect. 107.29.5.3.2 includes five 1-byte numbers, so option C is incorrect. 98.7.104.0/24 (option D) is a network address—the trailing /24 indicates that the final byte is a machine identifier, and the first 3 bytes specify the network. Option E, 255.255.255.255, meets the basic form of an IP address, but it’s a special case—this is a broadcast address that refers to all computers, rather than the single computer specified by the question. |
43.
You want to set up a computer on a local network via a static TCP/IP configuration, but
you lack a gateway address. Which of the following is true?
- A.Because the gateway address is necessary, no TCP/IP networking functions will work.
- B.TCP/IP networking will function, but you’ll be unable to convert hostnames to IP addresses or vice versa.
- C.You’ll be able to communicate with machines on your local network segment but not with other systems.
- D.Since a gateway is needed only for IPv6, you’ll be able to use IPv4 but not IPv6 protocols.
- E.Without a gateway address available, you’ll be unable to use DHCP to simplify configuration.
- Answer & Explanation
- Report
Answer : [C]
Explanation :
Explanation :
| The gateway computer is a router that transfers data between two or more network segments. As such, if a computer isn’t configured to use a gateway, it won’t be able to communicate beyond its local network segment, making option C correct. A gateway is not necessary for communicating with other systems on the local network segment, so option A is incorrect. If your DNS server is on a different network segment, name resolution via DNS won’t work, as stated in option B; however, other types of name resolution, such as /etc/hosts file entries, will still work, and the DNS server might be on the local network segment, so option B is incorrect. Gateways play the same function in both IPv4 and IPv6 networking, so option D is incorrect. DHCP functions fine without a gateway, provided a DHCP server is on the same local network segment as its clients (as is normally the case), so option E is incorrect. |
44.
Using a packet sniffer, you notice a lot of traffic directed at TCP port 22 on a local computer.
What protocol does this traffic use, assuming it’s using the standard port?
- A.HTTP
- B.SMTP
- C.Telnet
- D.SSH
- E.NNTP
- Answer & Explanation
- Report
Answer : [D]
Explanation :
Explanation :
| The Secure Shell (SSH) protocol uses port 22, so if the traffic to port 22 is using the correct protocol, it’s SSH traffic, and option D is correct. The Hypertext Transfer Protocol (HTTP; option A) is conventionally bound to port 80; the Simple Mail Transfer Protocol (SMTP; option B) uses port 25; Telnet (option C) uses port 22; and the Network News Transfer Protocol (NNTP; option E) uses port 119. None of these would normally be directed to port 22. |
45.
What network port would an IMAP server normally use for IMAP exchanges?
- A.21
- B.25
- C.110
- D.143
- E.443
- Answer & Explanation
- Report
Answer : [D]
Explanation :
Explanation :
| The Interactive Mail Access Protocol (IMAP) is assigned to TCP port 143. Ports 21, 25, 110, and 443 are assigned to the File Transfer Protocol (FTP), the Simple Mail Transfer Protocol (SMTP), the Post Office Protocol version 3 (POP-3), and the Hypertext Transfer Protocol over SSL (HTTPS), respectively. Although some IMAP server programs also support POP-3 and might therefore listen to both ports 110 and 143, the question specifies IMAP exchanges, so option D is the only correct answer. |
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