CCST Network Troubleshooting Tools 1 — Questions and Answers
Question 1: Which command-line tool sends ICMP echo requests to test basic connectivity between two hosts?
- ping (Correct answer)
- traceroute
- nslookup
- netstat
Correct answer: ping
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?
- ping
- ipconfig
- traceroute (Correct answer)
- arp
Correct answer: traceroute
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?
- ifconfig
- ipconfig (Correct answer)
- netstat
- route
Correct answer: ipconfig
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?
- nmap
- arp
- nslookup (Correct answer)
- route
Correct answer: nslookup
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?
- arp -a (Correct answer)
- ipconfig /all
- netstat -r
- ping -a
Correct answer: arp -a
The 'arp -a' command displays all current entries in the ARP cache, listing IP-to-MAC address mappings.
Question 6: Which tool provides active TCP/UDP connection information, listening ports, and routing tables on a local system?
- traceroute
- netstat (Correct answer)
- dig
- whois
Correct answer: netstat
netstat (network statistics) displays active connections, open ports, and routing table information on the local host.
CCST Network Troubleshooting Tools 1
Which command-line tool sends ICMP echo requests to test basic connectivity between two hosts?