Network Commands

Question 1

ping

Answer 1

sends Internet Control Message Protocol (ICMP) echo request to host and listens for reply.

Question 2

traceroute/tracert

Answer 2

Traces the route of a packet to its destination

Question 3

tracepath

Answer 3

similar to traceroute, but can be used by all users.

Question 4

ipconfig

Answer 4

provides user with IP, subnet mask, and default gateway

Question 5

ifconfig

Answer 5

configures kernel network interfaces

Question 6

ARP

Answer 6

Address Resolution Protocol. Displays IP to physical (MAC) address mappings for hosts in the cache. Host must be on local network.

Question 7

netstat

Answer 7

Network statistics. Displays info about active ports.

Question 8

nslookup

Answer 8

Name Server Lookup. Displays DNS and IP address mappings.

Question 9

dig

Answer 9

Domain Information Groper. Query DNS name servers. Replaced nslookup.

Question 10

whois

Answer 10

used to lookup who owns domain or block of IP addresses. Can be hidden with privacy options.

Question 11

route

Answer 11

Displays current route tables on host.

Question 12

scp

Answer 12

Secure Copy Protocol. Securely copies files between servers. Uses SSH for authentication and encryption.

Question 13

ftp

Answer 13

File Transfer Protocol. Data is unencrypted. Copies files from one host to another.

Question 14

finger

Answer 14

displays info about user on remote system

Question 15

nmap

Answer 15

Network Mapper. Scans networks to find hosts and open ports. Finds what is deployed on network for vulnerability analysis.

Question 16

telnet/ssh

Answer 16

Allows user to manage accounts. SSH is encrypted, telnet is not.