Unicast transmission: A unicast transmission is always meant for just one receiving address
URG flag: One of the TCP control flags. URG is short for urgent. A value of one here indicates that the segment is considered urgent and that the urgent pointer field has more data about this
Urgent pointer field: A field used in conjunction with one of the TCP control flags to point out particular segments that might be more important than others
User Datagram Protocol (UDP): A transfer protocol that does not rely on connections. This protocol does not support the concept of an acknowledgement. With UDP, you just set a destination port and send the data packet
V
Virtual LAN (VLAN): It is a technique that lets you have multiple logical LANs operating on the same physical equipment
Virtual Private Network (VPN): A technology that allows for the extension of a private or local network, to a host that might not work on that same local network
VLAN header: A piece of data that indicates what the frame itself is. In a data packet it is followed by the EtherType
Zone Files: Simple configuration files that declare all resource records for a particular zone
Module 1 Glossary
New terms and their definitions: Course 3 Module 1
Absolute path: It is one that starts from the main directory
Alias: A nickname for common commands
Appending flags: A way to add the data of the file without erasing existing data
Bash: The language used to interact with the shell
CLI: Command line interpreter
Command line: A text interface program for a computer that inputs text commands and translates them to the operating system
Escape characters: A concept that means that the next character after the back tick should be treated literally
.exe: A file extension found in Windows for an executable file
