The FREE Cybersecurity Glossary by Thor Pedersen!

10Base2: A specific type of Ethernet network standard characterized by a maximum data transfer rate of 10 Mbps, baseband transmission, and a maximum cable segment length of 185 meters. This standard, also known as thin Ethernet or thinnet, uses a thinner and more flexible coaxial cable, allowing for easier installation and management in environments such as office buildings.

10Base5: A specification for thick Ethernet, a networking standard that also operates at a data transfer rate of 10 Mbps but uses thicker, more rigid coaxial cables that can transmit data over a maximum distance of 500 meters. The name '10Base5' is derived from its 10 Mbps speed, baseband transmission, and 500-meter cable limit. Due to its ability to handle greater distances, it's often used in larger, more sprawling network setups.

10BaseT: An Ethernet standard that operates at 10 Mbps and uses baseband transmission over twisted pair cabling. The 'T' in 10BaseT stands for 'Twisted pair,' indicating the type of cabling used. It is designed for small, local networks and supports star network configurations, which centralize network control and allow easier detection of connection issues.

3-2-1 Backup Strategy: A best practice for data protection and disaster recovery, recommending three copies of data stored on two different types of storage media, with one of the copies stored off-site. This strategy offers multiple recovery points and storage diversity to increase the likelihood of data recovery after a disaster, ensuring data safety even when faced with hardware failure, natural disaster, or accidental deletion.

3DES: 3DES, or Triple Data Encryption Standard, is a symmetric key encryption algorithm that encrypts data three times using two or three keys. It is considered a more secure alternative to the original Data Encryption Standard (DES) algorithm, as it increases the difficulty of breaking the encryption by using multiple keys. It should be noted that while 3DES was a more secure alternative to DES, it is now considered deprecated in favor of more secure algorithms like AES.

3-legged DMZ: A network design strategy that uses three security zones - the Internet (untrusted), an intermediary area known as the Demilitarized Zone (DMZ), and the internal network (trusted). The DMZ hosts public-facing services, acting as a buffer between the Internet and the internal network. This model adds an extra layer of protection by ensuring direct traffic between the Internet and the trusted network is minimized and strictly controlled. This setup does not always involve a single intermediary DMZ; there can be multiple DMZs depending on the complexity of the network design.