Basic Networking Part 1

Question 1

What is a special virtual network interface that allows internal communication on a computer? What is the address?

Answer 1

Loopback Device
It has an address of 127.0..0.1

Question 2

What command shows and manipulates routing, devices, policy routing, and tunnels? It replaces the now deprecated ifconfig and route commands.

Answer 2

IP
- It incorporates objects to manage the different aspects of networks.

Question 3

What are some notable objects for the ip command?

Answer 3

-address
-link
-route
-can you ip -a, ip -r or ip -l
-changes made through this command will not persist through reboot

Question 4

What displays addresses and their properties, add new addresses, and delete old ones?

Answer 4

address

Question 5

What displays device attributes, add/delete devices and change device states?

Answer 5

link

Question 6

What displays and manipulates entries in the kernel routing table?

Answer 6

route

Question 7

What is a utility used to investigate network sockets and dump socket statistics? It is a replacement for the now deprecated netstat command

Answer 7

ss

Question 8

What is the DNS lookup utility that provides flexibility for interrogating DNS name servers. It is most robust then predecessor nslookup and provides more functionality then the simpler host command.

Answer 8

dig

Question 9

What command used to send ICMP echo requests

Answer 9

ping

Question 10

To make IP commands permanent network config files must be updated directly through a command line utility the file locations are

Answer 10

/etc/network for debian
/etc/sysconfig/network for suse
/etc/sysconfig/network-scripts for red hat