CCST Network Troubleshooting Tools

Question 1

Which command-line tool sends ICMP echo requests to test basic connectivity between two hosts?

Accepted Answer

ping

Answer

The ping command sends ICMP echo requests to a destination host to verify basic IP connectivity.

Question 2

A technician wants to see every router hop a packet traverses from source to destination. Which tool should they use?

Accepted Answer

traceroute

Answer

Traceroute (tracert on Windows) reveals each hop along the path by incrementing the TTL value of probe packets.

Question 3

Which Windows command displays the local machine's IP address, subnet mask, and default gateway?

Accepted Answer

ipconfig

Answer

ipconfig is the Windows command that displays all current TCP/IP network configuration values for each adapter.

Question 4

A technician suspects a DNS issue. Which tool can be used to query a DNS server for hostname-to-IP resolution?

Accepted Answer

nslookup

Answer

nslookup queries DNS servers interactively to resolve hostnames to IP addresses and troubleshoot DNS issues.

Question 5

Which command displays the ARP cache, showing the mapping of IP addresses to MAC addresses?

Accepted Answer

arp -a

Answer

The 'arp -a' command displays all current entries in the ARP cache, listing IP-to-MAC address mappings.

(CCST) Cisco Certified Support Technician Practice Test