5.2 commands

Question 1

What command should be used to manually enter the default gateway for a computer?

Answer 1

route

Question 2

Which Windows network diagnostic tool displays the path packets take between two endpoints?

Answer 2

tracert

Question 3

nslookup does what?

Answer 3

Displays the domain name associated with an IP, or the IP of a known domain.

Question 4

arp does what?

Answer 4

Shows the MAC address for a known IP address

Question 5

ipconfig does what?

Answer 5

Displays IP address, subnet mask, gateway, DNS, and other TCP/IP stack parameters on a Windows PC

Question 6

What are the four most important ipconfig flags?

Answer 6

/release
/renew
/flushdns
/all

Question 7

What is ifconfig?

Answer 7

Displays IP address configuration parameters on a Unix based device

Question 8

Ping and tracert use what protocol? Why is this important to know?

Answer 8

They both use ICMP, it is good to know because it may be blocked by a firewall or have low priority which will impact troubleshooting

Question 9

What can you use to perform the functions of ping and traceroute with one command?

Answer 9

pathping

Question 10

Which POSIX/Unix network diagnostic tool displays the path packets take between two endpoints?

Answer 10

traceroute

Question 11

IOS uses a different version of traceroute, what port does it use?

Answer 11

UDP/33434

Question 12

What tool can be used to find information on DNS server such as names and IP addresses?

Answer 12

nslookup (Windows)

dig (Unix)

Question 13

dig has replaced what?

Answer 13

nslookup

Question 14

What is iptables?

Answer 14

Linux stateful firewall

Question 15

What command can control inbound and outbound traffic on Linux?

Answer 15

iptables

Question 16

netstat does what?

Answer 16

It show many network statistics such active as connections and programs.

Question 17

What are the 3 important netstat flags?

Answer 17

netstat -a : shows all active connections

netstat -b : shows binaries (running processes) that created an active network connection

netstat -n : shows IPs only, does not perform DNS lookup

Question 18

What would you use to find out what program is connecting to a remove IP?

Answer 18

netstat -a -b

Question 19

What is tcpdump?

Answer 19

Unix packet capture tool

Question 20

What tool would you use to find information on detailed traffic patterns for use with a protocol analyzer?

Answer 20

tcpdump

Question 21

What is pathping?

Answer 21

combines tracert and ping

Question 22

What would you use to find other devices and services on your network?

Answer 22

nmap

Question 23

What would you use to find what OS a remote device is using without logging into it?

Answer 23

nmap

Question 24

What is nmap?

Answer 24

A network mapping tool that can be used to find open ports, services, OSs, and devices on a network.

Question 25

What tool can you use to find vulnerabilities on a network?

Answer 25

nmap

Question 26

route does what?

Answer 26

Shows the device’s IPv4 and IPv6 routing tables

Question 27

What is the most important flag for route?

Answer 27

route print

Question 28

“print” is to be used with what command?

Answer 28

route print

Question 29

how do you view the IP-MAC associations on a Windows device?

Answer 29

arp -a