Chapter 10: Troubleshooting Networking and Security Issues and Understanding Methodologies
D. SSH is the encrypted version of the Telnet protocol and is used to access remote devices using a command-line interface. RDP is a Windows graphical interface. Telnet does not offer encryption, and terminal servers offer serial port access but may or may not support encrypted network access.
C. tcpdump allows a Linux system to capture live network traffic and is useful in monitoring and troubleshooting. Sometimes called sniffing, tcpdump allows you to set up filters to select the traffic you are interested in capturing for troubleshooting. Think of tcpdump as a command-line network analyzer. dig and nslookup show DNS resolution but do not display the actual packets going across the wire. netstat shows connection information and is not DNS related.
A. ARP is the protocol that determines the mapping of an IP address to the physical MAC address on a local network. The mappings can be seen with...
