Commands

Question 1

Network Statistics (netstat)

Answer 1

• Display information for IP-based connections
• Current sessions
• Source and destination IPs
• Port numbers

Question 2

netstat -a

Answer 2

• All sockets, including listing
• TCP&UDP connections
• Addresses and port #s expressed numerically
• Host names

Question 3

netstat -o

Answer 3

• Displays active TCP connections (no listening)
• Includes process ID (PID) for each connection. (goes back to task man)
• You can find the application based on the PID on the Processes tab in Task Manager.
• Can be combined with -a, -n, and -p

Question 4

netstat -n

Answer 4

• Displays active TCP connections, (not listening)
• Addresses and port numbers are expressed numerically

Question 5

netstat -s

Answer 5

• Displays statistics by protocol.
• TCP, UDP, ICMP, and IP protocols display by default
• The -p parameter can be used to specify a set of protocols
• If the IPv6 protocol is installed, statistics are shown for the TCP over IPv6, UDP over IPv6, ICMPv6, and IPv6 protocols.
  .

Question 6

tcpdump

Answer 6

Display TCP/IP and other packets being transmitted or received

Question 7

Network Mapper (nmap)

Answer 7

Discovers hosts and services on a computer network by sending packets and analyzing the responses

Question 8

show interface

Answer 8

Displays statistics for the network interfaces on the network platform

can specify interface with (ethernet #/#)

Question 9

show config

Answer 9

Displays the current network platform configuration

Question 10

show route

Answer 10

Displays the current sat of the routing table on the network platform

Question 11

show startup-config

Answer 11

Command to show start configuration on router

Question 12

show running-config

Answer 12

Command to show Running configuration on router

Question 13

copy running-config startup-config

Answer 13

Command to save Running configuration to start configuration on a router

Question 14

ip (command)

Answer 14

Assigns an address to a network interface or configures network interface parameters in Unix, Linux, and OS X

Question 15

Name Server Lookup (nslookup)

Answer 15

Used to query the DNS to provide the mapping between domain names and IP address or other DNS records

Question 16

dig

Answer 16

Used to conduct queries against DNS nameservers and is only available for Linus, Unix, and OS X systems by default

Question 17

dig -t ____

Answer 17

Specify type of DNS record

Question 18

Address Resolution Protocol (arp) command

Answer 18

Used to display and modify entries in the Address Resolution Protocol (or ARP) cache on a system

Question 19

arp -a

Answer 19

View ARP cache

Question 20

arp -d ipaddress

Answer 20

delete an IP address from an ARP table

Question 21

arp -s ipaddress macaddress

Answer 21

staticly assign an ip address to an ARP table

Question 22

arp -d

Answer 22

delete entire ARP cache

Question 23

route

Answer 23

Command used to view and manipulate the IP routing table in Windows, Linux, Unix, or OS X

Question 24

route print

Answer 24

Command to display IP routing table in Windows

Question 25

route -n

Answer 25

Display routing table in Linux and Unix

Question 26

route add destnetwork mask subnetmask metric # if #

Answer 26

Add static route to routing table

Question 27

nbtstat

Answer 27

Command used to view the current connections and statistics for devices communicating using the NetBIOS over TCP/IP protocol

Windows Only

Question 28

Interface Configuration (ifconfig)

Answer 28

Command line tool used in Unix, Linux, and OS X systems to display IP address information