Troubleshooting Tools Flashcards
ipconfig
View and Manage IP configuration /all = display all details /release = release DHCP lease /renew = renew DHCP lease /flushdns = flush the DNS resolver cache
netstat
Display network statistics
- a = show all active connections
- b = show binaries
- n = do not resolve names
ifconfig
View and manage IP configuration
linux interface configuration
ping
ping6
ping -6
test reachability test reachability to TCP/IP address -t = ping until stopped with Ctrl c -a = resolve address to hostname -n = send # of echo requests -f = send with don't fragment flag set
tracert
tracert -6
pings every router hop from the source to the destination and reports the round time trip for every router hop
nbtstat
Query NetBIOS over TCP/IP information
- n = list local NetBIOS names
- A = list remote NetBios names
- a = list remote NetBIOS names
nslookup / dig
look up information from DNS servers
arp
Address Resolution protocol information
- a = view the local ARP table
pathping
combination of ping and traceroute
multimeter
AC/DC voltages
continuity
wire mapping
fuse status
cable tester
can identify missing pins or crossed wires
not generally used for frequency testing
toner probe
puts an analog sound on the wire
inductive probe doesnt need to touch the copper
easy to use
different connectors
speed test sites
bandwidth testing
provide useful pre and post change analysis
measure at different times
not all sites are the same
looking glass sites
view routing table configurations
protocol analyzer
capture and display network traffic
use a physical tap or redirect on the switch