Network Security Foundation Study Guide: Key Commands and Protocols, Exams of Information Technology

This study guide provides a concise overview of essential network and security commands and protocols, including traceroute, nslookup, ping, netstat, whois, arp, nmap, ipconfig, ifconfig, dig, route, scp, ftp, tftp, finger, tcpdump, telnet/ssh, and tracepath. Each command is briefly explained, highlighting its function and usage in network troubleshooting and security analysis. Useful for students and professionals seeking to understand network fundamentals and security practices. It offers practical insights into network administration and security.

Typology: Exams

2025/2026

Available from 12/19/2025

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WGU NETORK AND SECURITY
FOUNDATION -C172 WITH WELL
EXPLAINED STUDY GUIDE
1. Traceroute - correct answer <<<<<๐Ÿ’•๐Ÿ’•๐Ÿ’•โœ”โœ”Used to determine the number of hops
required for a packet to reach its destination.
2. Nslookup - correct answer <<<<<๐Ÿ’•๐Ÿ’•๐Ÿ’•โœ”โœ”Used to determine IP address of a domain
name.
3. Ping - correct answer <<<<<๐Ÿ’•๐Ÿ’•๐Ÿ’•โœ”โœ”Used to determine the IP address and latency in
networks.
4. Netstat -a - correct answer <<<<<๐Ÿ’•๐Ÿ’•๐Ÿ’•โœ”โœ”Used to display IP ports currently open on
the Windows OS.
5. Whois - correct answer <<<<<๐Ÿ’•๐Ÿ’•๐Ÿ’•โœ”โœ”Information about a webserver including contact
information.
6. ARP - correct answer <<<<<๐Ÿ’•๐Ÿ’•๐Ÿ’•โœ”โœ”This command displays the IP to physical (MAC)
address mappings for hosts that have been discovered in the ______ cache. ______ can be used
to add, remove, or modify entries in the ______ cache. The hosts need to be on the local
network, as these addresses are discovered by broadcasting to everyone on the network and
noting the reply from the owner; broadcast traffic is not allowed through a router so that the
system will maintain the MAC address of the router.
7. Nmap - correct answer <<<<<๐Ÿ’•๐Ÿ’•๐Ÿ’•โœ”โœ”This command scans networks to see what it can
find in terms of hosts and open ports (including well-
8. known ones for many applications). It is commonly used to determine what is deployed on a
network for
9. vulnerability analysis, security scans, and related activities.
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WGU NETORK AND SECURITY

FOUNDATION - C172 WITH WELL

EXPLAINED STUDY GUIDE

  1. Traceroute - correct answer <<<<<๐Ÿ’•๐Ÿ’•๐Ÿ’•โœ”โœ”Used to determine the number of hops required for a packet to reach its destination.
  2. Nslookup - correct answer <<<<<๐Ÿ’•๐Ÿ’•๐Ÿ’•โœ”โœ”Used to determine IP address of a domain name.
  3. Ping - correct answer <<<<<๐Ÿ’•๐Ÿ’•๐Ÿ’•โœ”โœ”Used to determine the IP address and latency in networks.
  4. Netstat - a - correct answer <<<<<๐Ÿ’•๐Ÿ’•๐Ÿ’•โœ”โœ”Used to display IP ports currently open on the Windows OS.
  5. Whois - correct answer <<<<<๐Ÿ’•๐Ÿ’•๐Ÿ’•โœ”โœ”Information about a webserver including contact information.
  6. ARP - correct answer <<<<<๐Ÿ’•๐Ÿ’•๐Ÿ’•โœ”โœ”This command displays the IP to physical (MAC) address mappings for hosts that have been discovered in the ______ cache. ______ can be used to add, remove, or modify entries in the ______ cache. The hosts need to be on the local network, as these addresses are discovered by broadcasting to everyone on the network and noting the reply from the owner; broadcast traffic is not allowed through a router so that the system will maintain the MAC address of the router.
  7. Nmap - correct answer <<<<<๐Ÿ’•๐Ÿ’•๐Ÿ’•โœ”โœ”This command scans networks to see what it can find in terms of hosts and open ports (including well-
  8. known ones for many applications). It is commonly used to determine what is deployed on a network for
  9. vulnerability analysis, security scans, and related activities.
  1. ipconfig - correct answer <<<<<๐Ÿ’•๐Ÿ’•๐Ÿ’•โœ”โœ”Provides the user with the IP, subnet mask, and default gateway for each network adapter by default with the /all option information, such as MAC address, DHCP status, and lease information. The command with the /release option can be used to release all connections and renew all adapters. It is primarily used in Windows.
  2. ifconfig - correct answer <<<<<๐Ÿ’•๐Ÿ’•๐Ÿ’•โœ”โœ”Similar to ipconfig, this command is used to configure the kernel network interfaces. It is implemented at the time of booting to configure the necessary interfaces. Once the interfaces are configured, it is used for debugging or tuning the system. It is primarily used in Linux.
  3. dig - correct answer <<<<<๐Ÿ’•๐Ÿ’•๐Ÿ’•โœ”โœ”A command used to query the DNS name servers. It is helpful in troubleshooting DNS problems. It is also used for lookups and will display answers from the query. It is a replacement for nslookup.
  4. route - correct answer <<<<<๐Ÿ’•๐Ÿ’•๐Ÿ’•โœ”โœ”This command can be used to display the current route tables on a host. It can also be used to add or remove routes. This is used by the local host to determine where to send traffic (0.0.0.0 means the default gateway, where the router sends things if it is not otherwise defined in the routing table).
  5. scp - correct answer <<<<<๐Ÿ’•๐Ÿ’•๐Ÿ’•โœ”โœ”This command is used to securely copy files between servers, leveraging SSH (secure shell) for authentication and encryption.
  6. ftp - correct answer <<<<<๐Ÿ’•๐Ÿ’•๐Ÿ’•โœ”โœ”This command copies the file from one host to another host. The data is unencrypted. If encryption is needed, the encrypted version uses SSL/TLS (Secure Sockets Layer, replaced by Transport Layer Security; the same encryption used in https). Transfer uses TCP (transmission control protocol) for reliability and is often used on the internet and other wide-area networks, where errors may be more common.
  7. tftp - correct answer <<<<<๐Ÿ’•๐Ÿ’•๐Ÿ’•โœ”โœ”This command transfers a file from either a client to a server or from a server to a client using UDP (user datagram protocol) instead of TCP, and so it is usually used on reliable (local) networks.