CompTIA Network+ Network+ Troubleshooting and Tools 2

Question 1

A technician uses the 'netstat -an' command and sees many connections in a TIME_WAIT state. What does this indicate?

Accepted Answer

Connections that have closed but are waiting for delayed packets to arrive

Answer

TIME_WAIT is a TCP state where a closed connection waits (typically 2x MSL) to ensure all delayed packets have been discarded.

Question 2

Which tool would best help a technician identify the path that packets take between a source and destination across the internet?

Accepted Answer

traceroute/tracert

Answer

Traceroute (tracert on Windows) sends packets with incrementing TTL values to map each hop along the network path.

Question 3

A user reports intermittent connectivity. A technician runs a continuous ping and observes occasional request timeouts. What is the most likely cause?

Accepted Answer

Packet loss on the network path

Answer

Intermittent ping timeouts indicate packet loss, which can be caused by a faulty cable, overloaded link, or failing network device.

Question 4

What does the 'arp -a' command display?

Accepted Answer

The ARP cache mapping IP addresses to MAC addresses

Answer

The 'arp -a' command displays the ARP cache, which shows resolved IP-to-MAC address mappings for recently contacted devices.

Question 5

A cable tester shows a 'split pair' fault. What does this mean?

Accepted Answer

Wires from different pairs are connected at both ends creating crosstalk

Answer

A split pair occurs when wires from different pairs are swapped at both ends; the cable tests as correctly wired but causes excessive crosstalk.

CompTIA Practice Test

CompTIA Practice Test

CompTIA Network+ Network+ Troubleshooting and Tools 2