Networking Tools

Question 1

Ping

Answer 1

Sends ICMP echo requests to a target host to test connectivity and measure round-trip time for messages sent to the target device

Question 2

Traceroute (Unix/Linux)
tracert (Windows)

Answer 2

Traces the path packets take from the source to the destination, showing each hop along the route.

traceroute Unix/Linux
tracert Windows

Question 3

nslookup

Answer 3

Queries DNS servers to find the IP address associated with a hostname

Question 4

tcpdump

Answer 4

Command-line packet analyzer; captures or filters TCP/IP packets that are received or transmitted over a network

Question 5

dig

Answer 5

Powerful command-line tool used for querying DNS servers.

Retrieves detailed info about DNS records such as A, AAAAA, CNAME, MX, NS

Diagnoses DNS issues by providing insights into domain name resolution and server responses.

Question 6

Netstat

Answer 6

Displays network connections (incoming and outgoing), routing tables, and a number of network interface statistics.

Question 7

ipconfig (Windows)
ifconfig (Old Linux)
ip (Modern Linux)

Answer 7

Displays or configures the network configuration of a device.

Question 8

arp

Answer 8

Displays or modifies the IP-to-MAC address translation tables used by the ARP

Question 9

nmap

Answer 9

Tool that discovers devices and servers on a network by sending packets and analyzing the responses.

Question 10

LLDP

Answer 10

Vendor-neutral protocol used to discover and share information between network devices on the same local network segment

Exchanges info about device identity, capabilities, and neighbors

Provides detailed network topology

Question 11

CDP

Answer 11

Cisco proprietary protocol similar to LLDP