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

Active connections that are transferring data

Answer

Connections that are waiting for the remote host to respond

Answer

Connections blocked by the local firewall

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

nslookup

Answer

netstat

Answer

arp

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

DNS server is offline

Answer

DHCP lease has expired

Answer

MTU mismatch on the NIC

Question 4

What does the 'arp -a' command display?

Accepted Answer

The ARP cache mapping IP addresses to MAC addresses

Answer

All active TCP connections on the host

Answer

All DNS records cached by the OS

Answer

The routing table of the local host

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

Two wires are shorted together

Answer

One wire has a break causing an open circuit

Answer

The cable length exceeds the 100m limit

Question 6

Which command on a Windows system would release the current DHCP-assigned IP address?

Accepted Answer

ipconfig /release

Answer

ipconfig /renew

Answer

ipconfig /flushdns

Answer

ipconfig /displaydns

Question 7

A technician suspects a duplicate IP address on the network. Which tool would most quickly confirm this?

Accepted Answer

arp -a

Answer

nslookup

Answer

netstat

Answer

route print