CCST Network Troubleshooting & Tools

Question 1

What does the 'ping' command test?

Accepted Answer

Connectivity

Answer

The 'ping' command is a fundamental network utility primarily used to test the reachability of a host on an Internet Protocol (IP) network. It sends ICMP echo request packets to a target host and listens for ICMP echo reply packets, thereby verifying basic network connectivity between the two devices. While it also measures round-trip time, its core function is to confirm connectivity.

Question 2

What tool traces the route packets take?

Accepted Answer

Traceroute

Answer

The 'traceroute' (or 'tracert' on Windows) command is a diagnostic tool that maps the path and measures transit delays of packets across an IP network. It identifies all the intermediate routers, or 'hops,' that a packet traverses from the source to the destination. This helps in pinpointing where network latency or connectivity issues might be occurring along the communication path.

Question 3

What command shows active connections?

Accepted Answer

Netstat

Answer

The 'netstat' (network statistics) command-line utility provides comprehensive information about network connections, routing tables, and network interface statistics. It is commonly used to display active network connections (both incoming and outgoing), identify listening ports, and troubleshoot network service issues on a local machine. This makes it invaluable for understanding network activity.

Question 4

What tool resolves IPs to MAC addresses?

Accepted Answer

ARP

Answer

ARP (Address Resolution Protocol) is a crucial protocol used to resolve IP addresses to MAC (Media Access Control) addresses within a local area network. When a device needs to communicate with another device on the same network segment, it uses ARP to discover the MAC address associated with the target device's known IP address. This mapping is fundamental for data link layer communication.

Question 5

What is used to detect physical connection issues?

Accepted Answer

Cable tester

Answer

A cable tester is a specialized hardware tool designed to verify the electrical connection and integrity of network cables, such as Ethernet or fiber optic cables. It can detect common physical connection issues like open circuits, short circuits, crossed pairs, or split pairs. Identifying these physical layer problems is critical for establishing and maintaining a reliable network link.

(CCST) Cisco Certified Support Technician Networking Practice Test

(CCST) Cisco Certified Support Technician Networking Practice Test

CCST Network Troubleshooting & Tools