UNIX Question and Answer – Network Services
UNIX MCQ – Multiple Choice Questions for exam, interview, and Entrance Test
1. Which command is used to transfer files between UNIX systems using the Kermit protocol?
a) kermit
b) ftp
c) sftp
d) scp
Answer: a) kermit
Explanation: The kermit command is used to initiate file transfer using the Kermit protocol, a robust file transfer protocol for UNIX systems.
2. What does NNTP stand for in the context of UNIX network services?
a) Network News Transport Protocol
b) Network News Transfer Protocol
c) Network Name Transport Protocol
d) Network Name Transfer Protocol
Answer: b) Network News Transfer Protocol
Explanation: NNTP is a protocol used for distributing, querying, retrieving, and posting news articles and Usenet messages in UNIX environments.
3. Which port number is commonly used by NNTP?
a) 20
b) 21
c) 23
d) 119
Answer: d) 119
Explanation: Port 119 is the default port number used by NNTP for communication.
4. Which command is used to read Usenet news articles in UNIX?
a) news
b) nntp
c) fetchnews
d) readnews
Answer: c) fetchnews
Explanation: The fetchnews command is used to retrieve Usenet news articles in UNIX.
5. What is the purpose of the nntp command in UNIX?
a) Display Usenet news articles
b) Post Usenet news articles
c) Configure NNTP settings
d) Delete Usenet news articles
Answer: b) Post Usenet news articles
Explanation: The nntp command is used to post Usenet news articles in UNIX.
6. Which protocol is commonly used for accessing remote printers in UNIX environments?
a) IPP
b) LPR
c) SNMP
d) LPD
Answer: d) LPD
Explanation: LPD (Line Printer Daemon) is a protocol used for accessing remote printers in UNIX environments.
7. Which command is used to send print jobs to a remote printer in UNIX using the LPD protocol?
a) print
b) lp
c) lpr
d) lpd
Answer: c) lpr
Explanation: The lpr command is used to send print jobs to a remote printer in UNIX using the LPD protocol.
8. What is the purpose of the lpc command in UNIX?
a) Display printer status
b) Manage printer queues
c) Configure printer settings
d) Print files
Answer: b) Manage printer queues
Explanation: The lpc command is used to manage printer queues in UNIX.
9. Which protocol is commonly used for network-based file sharing in Windows environments?
a) SSH
b) SMB
c) NFS
d) FTP
Answer: b) SMB
Explanation: SMB (Server Message Block) is a protocol used for network-based file sharing in Windows environments.
10. Which command is used to mount a remote SMB share in UNIX?
a) mount
b) smbmount
c) cifs
d) smbclient
Answer: b) smbmount
Explanation: The smbmount command is used to mount a remote SMB share in UNIX.
11. What is the purpose of the smbclient command in UNIX?
a) Mount a remote SMB share
b) Access a remote SMB share
c) Manage Samba configuration
d) Display SMB server status
Answer: b) Access a remote SMB share
Explanation: The smbclient command is used to access a remote SMB share in UNIX.
12. Which command is used to unmount a remote SMB share in UNIX?
a) umount
b) smbunmount
c) unmount
d) smbclient
Answer: a) umount
Explanation: The umount command is used to unmount a remote SMB share in UNIX.
13. What does SNMP stand for in the context of UNIX network services?
a) Simple Network Management Protocol
b) Secure Network Management Protocol
c) System Network Management Protocol
d) Standard Network Management Protocol
Answer: a) Simple Network Management Protocol
Explanation: SNMP is a protocol used for managing network devices and systems in UNIX environments.
14. Which port number is commonly used by SNMP?
a) 20
b) 21
c) 161
d) 162
Answer: c) 161
Explanation: Port 161 is the default port number used by SNMP for communication.
15. Which command is used to query SNMP-enabled devices in UNIX?
a) snmpget
b) snmpwalk
c) snmpquery
d) snmpinfo
Answer: a) snmpget
Explanation: The snmpget command is used to query SNMP-enabled devices and retrieve specific information in UNIX.
16. What does DHCP stand for in the context of UNIX network services?
a) Dynamic Host Control Protocol
b) Domain Host Configuration Protocol
c) Dynamic Host Configuration Protocol
d) Domain Host Control Protocol
Answer: c) Dynamic Host Configuration Protocol
Explanation: DHCP is a network management protocol used to dynamically assign IP addresses and other network configuration parameters to devices on a network.
17. Which port number is commonly used by DHCP?
a) 53
b) 67
c) 68
d) 69
Answer: b) 67
Explanation: Port 67 is used by DHCP servers for sending DHCP messages.
18. Which command is used to configure a DHCP client on a UNIX system?
a) dhcpclient
b) dhclient
c) dhcpconfig
d) dhconfig
Answer: b) dhclient
Explanation: The dhclient command is used to configure a DHCP client on a UNIX system.
19. What is the primary purpose of the dhcpd daemon in UNIX?
a) Assign IP addresses to DHCP clients
b) Configure DHCP client settings
c) Manage DNS records
d) Monitor network traffic
Answer: a) Assign IP addresses to DHCP clients
Explanation: The dhcpd daemon is responsible for assigning IP addresses to DHCP clients in UNIX.
20. Which command is used to configure a DHCP server on a UNIX system?
a) dhcpserver
b) dhcpsrv
c) dhcpd
d) dhserver
Answer: c) dhcpd
Explanation: The dhcpd command is used to configure a DHCP server on a UNIX system.
21. What is the primary role of a DNS server in UNIX?
a) Assign IP addresses to devices on a network
b) Translate domain names into IP addresses
c) Authenticate users for network access
d) Manage network routing tables
Answer: b) Translate domain names into IP addresses
Explanation: DNS servers resolve domain names to IP addresses, allowing devices to locate resources on a network.
22. Which port number is commonly used by DNS?
a) 53
b) 67
c) 68
d) 69
Answer: a) 53
Explanation: Port 53 is used by DNS servers for both TCP and UDP communications.
23. Which command is used to query DNS servers and retrieve information about domain names in UNIX?
a) nslookup
b) dig
c) host
d) dnsquery
Answer: b) dig
Explanation: The dig command is used to perform DNS queries and retrieve information about domain names in UNIX.
24. What is the purpose of the host command in UNIX?
a) Display DNS records
b) Query DNS servers
c) Configure DNS settings
d) Resolve domain names to IP addresses
Answer: d) Resolve domain names to IP addresses
Explanation: The host command is used to perform DNS lookups and resolve domain names to IP addresses in UNIX.
25. Which command is used to configure DNS client settings on a UNIX system?
a) dnsconfig
b) named
c) resolvconf
d) dig
Answer: c) resolvconf
Explanation: The resolvconf command is used to configure DNS client settings on a UNIX system.
26. What does NTP stand for in the context of UNIX network services?
a) Network Time Protocol
b) Network Transfer Protocol
c) Network Test Protocol
d) Network Transmission Protocol
Answer: a) Network Time Protocol
Explanation: NTP is a protocol used to synchronize the clocks of computer systems over a network.
27. Which port number is commonly used by NTP?
a) 37
b) 123
c) 143
d) 161
Answer: b) 123
Explanation: Port 123 is used by NTP servers and clients for time synchronization.
28. Which command is used to query NTP servers and synchronize the system clock in UNIX?
a) ntpq
b) ntpdate
c) ntpsync
d) ntpclient
Answer: b) ntpdate
Explanation: The ntpdate command is used to query NTP servers and synchronize the system clock in UNIX.
29. What is the primary purpose of the ntpq command in UNIX?
a) Set system time
b) Query NTP servers
c) Configure NTP settings
d) Display system time
Answer: b) Query NTP servers
Explanation: The ntpq command is used to query NTP servers and retrieve information about their status and performance in UNIX.
30. Which command is used to configure an NTP client on a UNIX system?
a) ntpconfig
b) ntpclient
c) ntpdate
d) ntpd
Answer: d) ntpd
Explanation: The ntpd command is used to configure an NTP client on a UNIX system.
31. What is the purpose of the ntpd daemon in UNIX?
a) Set system time
b) Query NTP servers
c) Synchronize system time
d) Manage NTP server settings
Answer: c) Synchronize system time
Explanation: The ntpd daemon continuously adjusts the system time to synchronize it with NTP servers in UNIX.
32. Which command is used to configure an NTP server on a UNIX system?
a) ntpconfig
b) ntpclient
c) ntpdate
d) ntpd
Answer: d) ntpd
Explanation: The ntpd command is used to configure an NTP server on a UNIX system.
33. What is the purpose of the rdate command in UNIX?
a) Set system time
b) Query NTP servers
c) Synchronize system time
d) Manage NTP server settings
Answer: c) Synchronize system time
Explanation: The rdate command is used to set or synchronize the system time with a remote server in UNIX.
34. Which protocol is commonly used for secure remote administration of UNIX systems?
a) Telnet
b) SSH
c) RSH
d) FTP
Answer: b) SSH
Explanation: SSH (Secure Shell) is commonly used for secure remote administration of UNIX systems.
35. Which command is used to remotely execute commands on a UNIX system over SSH?
a) ssh
b) scp
c) sftp
d) sshexec
Answer: a) ssh
Explanation: The ssh command is used to remotely execute commands on a UNIX system over SSH.
36. What does SNMP stand for in UNIX network services?
a) Simple Network Management Protocol
b) Secure Network Monitoring Protocol
c) Systematic Network Management Protocol
d) Secure Network Management Protocol
Answer: a) Simple Network Management Protocol
Explanation: SNMP facilitates the management and monitoring of network devices and systems.
37. Which port is commonly used by SNMP for communication?
a) 21
b) 23
c) 161
d) 162
Answer: c) 161
Explanation: Port 161 is utilized by SNMP for communication between the manager and the agents.
38. What is the function of an SNMP manager?
a) To store network management information
b) To monitor and manage SNMP agents
c) To interpret SNMP traps
d) To compile network statistics
Answer: b) To monitor and manage SNMP agents
Explanation: An SNMP manager is responsible for monitoring and controlling SNMP agents within a network.
39. Which command is used to query SNMP-enabled devices for information in UNIX?
a) snmpwalk
b) snmpget
c) snmpquery
d) snmpinfo
Answer: b) snmpget
Explanation: The snmpget command retrieves information from SNMP-enabled devices in UNIX.
40. Which SNMP message type is sent from an agent to the manager without a request?
a) GetRequest
b) GetResponse
c) Trap
d) Inform
Answer: c) Trap
Explanation: SNMP traps are unsolicited messages sent from agents to managers to indicate an event or error condition.
41. Which command is used to send an SNMP trap from a UNIX system?
a) snmptrap
b) snmpsend
c) snmpalert
d) snmpnotify
Answer: a) snmptrap
Explanation: The snmptrap command is used to send SNMP traps from a UNIX system to an SNMP manager.
42. What does SMTP stand for in UNIX network services?
a) Simple Mail Transfer Protocol
b) Secure Mail Transfer Protocol
c) System Mail Transfer Protocol
d) Secure Message Transfer Protocol
Answer: a) Simple Mail Transfer Protocol
Explanation: SMTP is used for sending and receiving email messages between servers.
43. Which port number is commonly used by SMTP?
a) 25
b) 53
c) 80
d) 110
Answer: a) 25
Explanation: Port 25 is the default port number for SMTP communication.
44. Which command is used to send an email from the command line in UNIX?
a) sendmail
b) mail
c) smtpsend
d) email
Answer: a) sendmail
Explanation: The sendmail command is utilized to send email messages from the command line in UNIX.
45. What does IMAP stand for in UNIX network services?
a) Internet Mail Access Protocol
b) Internet Message Access Protocol
c) Interactive Mail Access Protocol
d) Integrated Mail Access Protocol
Answer: b) Internet Message Access Protocol
Explanation: IMAP is used by email clients to retrieve email messages from a mail server.
46. Which port number is commonly used by IMAP?
a) 143
b) 25
c) 110
d) 587
Answer: a) 143
Explanation: Port 143 is typically used by IMAP for communication.
47. Which command is used to configure an IMAP client in UNIX?
a) imapclient
b) imconfig
c) imapconfig
d) imap
Answer: d) imap
Explanation: The imap command is used to configure an IMAP client in UNIX.
48. What does POP3 stand for in UNIX network services?
a) Post Office Protocol version 3
b) Protocol for Online Processing version 3
c) Public Operations Protocol version 3
d) Primary Online Protocol version 3
Answer: a) Post Office Protocol version 3
Explanation: POP3 is used to retrieve email messages from a mail server to a client.
49. Which port number is commonly used by POP3?
a) 110
b) 143
c) 25
d) 587
Answer: a) 110
Explanation: Port 110 is the default port number for POP3 communication.
50. Which command is used to configure a POP3 client in UNIX?
a) popclient
b) popconfig
c) pop3
d) fetchmail
Answer: d) fetchmail
Explanation: The fetchmail command is used to configure a POP3 client in UNIX.
