Windows Network Command Line

Question 1

ipconfig

Answer 1

• Most of your troubleshooting starts with your IP address
• ping your local router/gateway
• determine TCP/IP and network adapter information
• and some additional IP details
• View additional configuration details
• DNS servers, DHCP server, etc

Question 2

Ping

Answer 2

• test reachability
• determine round-trip time
• Uses ICMP
• one of the primary troubleshooting tools

Question 3

Netstat

Answer 3

• network statistics
• many different operating systems
• netstat -a
• show all active connections
• netstat -b
• show binaries (windows)
• Requires elevation
• netstat -n
• do not resolve names (all ips)

Question 4

Nslookup

Answer 4

• name server lookup
• lookup information from DNS servers
• Canonical names, IP addresses, cache timers, etc
• lookup names and IP addresses

Question 5

net

Answer 5

Windows network commands

Question 6

Common net commands

Answer 6

• view network resources
• net view \<servername></servername>
• net view /workgroup:<workgroupname></workgroupname>
• map a network share to a drive letter
• Net use drive: \<servername>\<sharename></sharename></servername>
• view user account information and reset passwords
• net user <username></username>
• Net user <username> * /domain</username>

Question 7

tracert

Answer 7

• Determine the route a packet takes to a destination
• map the entire path
• Takes advantage of ICMP Time to Live Exceeded error message
• the time in TTL refers to hops, not seconds or minutes
• TTL=1 is the first router, TTL=2 is the second router, etc.
• not all device will reply with ICMP Time Exceeded messages
• some firewalls filter ICMP
• ICMP is low-priority for many devices

Question 8

pathping

Answer 8

• combine ping and traceroute
• included with Windows NT and later
• first phase runs a traceroute
• build a map
• second phase
• measure round trip time and packet loss at each hop