Networking Review Questions

Q. Which service is responsible for maintaining consistent device naming? A. The udevd service handles consistent naming of network devices.

Q. List three key differences between TCP and UDP protocols. A. TCP is connection-oriented, reliable, and point-to-point; UDP is connectionless, unreliable, and multi-point.

Q. What is the significance of the NAME and DEVICE directives in a connection profile? A. The NAME directive sets the name for the network connection and the DEVICE directive defines the network device the connection is associated with.

Q. Which class of IP addresses has the least number of node addresses? A. The C class supports the least number of node addresses.

Q. Which command can you use to display the hardware address of a network device? A. The ip command.

Q. Define protocol. A. A set of rules that govern the exchange of information between two network entities.

Q. Which directory stores the network connection profiles? A. /etc/NetworkManager/system-connections/

Q. True or False. A network device is a physical or virtual network port and a network connection is a configuration file attached to it. A. True.

Q. IPv4 is a 32-bit software address. How many bits does an IPv6 address have? A. 128.

Q. Which file defines the port and protocol mapping? A. The /etc/protocols file.

Q. What would the command hostnamectl set-hostname host20 do? A. The command provided will update the /etc/hostname file with the specified hostname and restart the systemd-hostnamed daemon for the change to take effect.

Q. Name the file that stores the hostname of the system. A. The /etc/hostname file.

Q. What would the command nmcli cs do? A. The command provided will display the status information for all network connections.

Q. The /etc/hosts file maintains hostname to hardware address mappings. True or False? A. False. This file maintains hostname to IP address mapping.

Q. Which file contains service, port, and protocol mappings? A. The /etc/services file.

Q. What would the ip addr command produce? A. This command provided will display information about network connections including IP assignments and hardware address.

Q. Which file would you consult to identify the port number and protocol associated with a network service? A. The /etc/services file.

Q. Name four commands that can be used to display the hostname. A. The hostname, uname, hostnamectl, and nmcli commands can be used to view the system hostname.

Q. List any two benefits of subnetting. A. Better manageability and less traffic.