1. CompTIA Network+ N10-006 Authorized Cert Guide
Chapter 10
Command-Line Tools

2. Foundation Topics
Windows Commands UNIX Commands

3. Using Command-Line Utilities
What are some of the more useful Microsoft Windows commands for configuring and troubleshooting network clients and servers? What are some of the more useful UNIX commands for configuring and troubleshooting network clients and servers?

4. Using Command-Line Utilities
Configuring and troubleshooting networks involves issuing commands at an operating system (OS) prompt.
Commands can be used on both clients and servers.
Some commands exist on both Microsoft Windows and UNIX/Linux platforms.

5. Windows Commands
arp displays the MAC address associated with a known IP address:
arp -a
Netstat displays information about IP-based connections on a PC. You can view information about current sessions, including source and destination IP address and port numbers.

6. Windows Commands
nbtstat displays NetBIOS information for IP-based networks:
nbtstat –a
Displays the NetBIOS table of a remote PC
nbtstat –c
Displays a PC’s NetBIOS name cache

7. Windows Commands
Ipconfig displays IP address configuration parameters on a Windows PC:
ipconfig /all
Provides additional configuration info
ipconfig /release
Releases an IP address from the PC
ipconfig /renew
Requests an IP address from the DHCP server

8. Windows Commands
ping is used to check IP connectivity between two network devices:
ping –n
Stops after five pings
Tracert displays the path between your device (the source) and a destination IP address, showing each router hop:
tracert
Note: Switches are not in the hops.

9. Windows Commands
route changes or displays contents of a PC’s current IP routing table:
route print
Displays the contents of the IP routing table
route delete
Deletes an entry from the IP routing table
nslookup resolves a fully qualified domain name (FQDN) to an IP address.

10. UNIX Commands
man displays information on how to use a UNIX command (short for manual).
arp displays the MAC address associated with a known IP address.

11. UNIX Commands nslookup and dig resolve FQDNs to IP addresses.
The dig command returns more information.
host will also resolve FQDNs to IP addresses.

12. UNIX Commands ifconfig displays IP address configuration parameters.
Similar to ipconfig on a Windows device
route –n displays the default gateway.
traceroute displays the path between your device (the source) and a destination IP address, showing each router hop.
Similar to tracert on a Windows device

13. UNIX Commands netstat displays information about IP-based connections.
View information about current sessions, including source and destination IP address and port numbers.
ping checks IP connectivity between two network devices (by default, pings forever):
ping –c
Stops after five pings

14. Summary Windows Commands UNIX Commands arp ipconfig nbtstat netstat
nslookup
ping
route
tracert
man
arp
dig and nslookup
host
ifconfig
traceroute
netstat
ping