Which troubleshooting method works from the physical layer in the OSI model up to the application layer?
The bottom-up method.
Which troubleshooting method starts with testing Layer 3?
The divide-and-conquer method.
What is the Cisco IOS command to view logging settings?
Router# show logging
What is the Cisco IOS command to enable the router to send logging information to a terminal session?
Router# terminal monitor
Name the three parameters checked by using ping
- Whether a remote host is active or inactive.
- The round-trip time (RTT) in communicating with the host.
- Packet Loss.
When pinging a host from a Cisco device, what symbol indicates that a reply was received within the expected timeout?
An exclamation point (!)
When pinging a host from a Cisco device, what symbol indicates that a reply was not received before the timeout expired?
A period (.)
What Transport Layer protocol is used by Cisco devices when using the traceroute command?
What is the Cisco IOS command to view the arp table? (two answers)
Router# show arp
Router# show ip arp
What is the Microsoft Windows command to view the arp table?
> arp -a
What is the Microsoft Windows command to view IPv4 address information?
> ipconfig /all
What is the Cisco IOS command to see a brief overview of interface IPv4 addressing and status info?
Router# show ip interface brief
List the three sources of Fiber media problems.
- Microbend and macrobend losses
- Splice losses.
- Dirty connectors.
What Cisco IOS command will let you examine duplex and speed settings on a switch port?
Switch# show interfaces
In the output from a “show interfaces” command, what do Input queue drops indicate?
Input queue drops indicate that more traffic was delivered to the device than it could process.
In the output from a “show interfaces” command, what do Output queue drops indicate?
Output queue drops indicate that packets were dropped due to congestion on the interface.
In the output from a “show interfaces” command, what do Input errors indicate?
Input errors indicate errors experienced during the reception of the frame, such as CRC errors.
What are CRC errors?
Cyclic Redundancy Check errors.
In the output from a “show interfaces” command, what do Output errors indicate?
Output errors indicate errors during the transmission of the frame. (Collisions)
Name two Microsoft Windows commands to determine the default gateway IP address.
> route print