Troubleshooting Networks Flashcards
1
Q
No Network Connectivity
A
- Ping loopback ( 127.0.0.1 )
- Ping local IP address
- Ping default gateway
- Ping devices on routes other side
- 8.8.8.8.
2
Q
Automatic Private IP Addressing
APIPA
A
- A link-local address
- No forwarding by routers
- IETF has allocated 169.254.1.0 though 169.254.254.255
- 169.254.0.0 /24 & 169.254.255.0 /24
- Automatically assigned
- Uses ARP to confirm the address isn’t used
3
Q
Limited or No Connectivity
A
-Windows alert in the system tray
- Check the local IP address
- APIPA addresses only have local connectivity
- If DHCP address is obtained perform the ping tests
- Local gateway , remote IP address
4
Q
Intermittent Connectivity
A
-Internet access then nothing
- Check system tray
- Broken LAN icon is a loss of signal
- Check for cable problem
- Might have bad network interface
Problem with a switch or access point
- Bad interfaces - Router rebooting
5
Q
IP Conflicts
A
DHCP helps
-Static address can conflict
-Windows will identify a duplicate and prevent conflict
- Two identical IP address will conflict
- Intermittent connectivity, if any
-Reboot or reset the NIC
6
Q
Slow Transfer Speeds
A
- Frustrating to user
- Router or infrastructure congestion
- Speed & duplex incompatibility
- Hardware issue with adapter or cabling
- Malware infection
7
Q
Low RF Wireless Signal
A
- Interference
- Signal strength
- incorrect channel
- Bounce & latency
- Incorrect access point placement
8
Q
Wireless interference
A
- Predictable
- Fluorescent light
- Microwave ovens
- Cordless telephones
- High power sources
-Unpredictable - Multi-tenant building
- Measurements
- Signal strength , performance monitor
9
Q
SSID Not Found
A
-Network name doesn’t appear
- Too far away
- Local networks are “louder”
-Wireless router has disabled SSID broadcast
