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A form of networking medium that contains the communicated data stream within some sort of cable. #III

Fourth Extended File Table: an advanced Linux file system. Features: everything from ext2 and ext3 file sizes up to 16 TB disk sizes up to 1 exabyte (EB) checksum integrity verification used for the journaling file.

aliases: Windows An operating system. Arguably the most known one. The GOAT, greatest of all time. Microsoft offers different versions of Windows for different uses. Home Edition Intended for use on a home computer. Offers basic features and functionality,...

aliases: LAN A small computer network confined to a specific geographical location. All of the nodes in a LAN network are directly connected to each other via cables or short-range wireless protocols. Most of the hardware equipment would be managed by a si...

aliases: WAN A network made up of smaller computer networks connected via long-distance links. A good example of a WAN network would be an enterprise network with branches in different parts of the world.

aliases: ISP A commercial (often subscription-based) company that offers access to the Internet to it's subscribers.

Media Access Control address: a 48-bit hexadecimal number used to identify computer systems by their NICs. The MAC address is hardcoded into the NIC's readonly memory during manufacturing. Properties All MAC addresses are unique. The first half of the 48-bit i...

The data link layer of the OSI reference model is responsible for transferring data between nodes that are on the same logical segment. The segment is where all nodes can send data to each other using hardware addresses, regardless of the physical topology of ...

The physical layer of the OSI reference model is responsible for the transmission and receipt analog signals that represents digital bits. The transmission media on the physical layer can either be cabled or wireless. Transceivers, repeaters, hubs, and media c...

The network layer of the OSI reference model handles the moving of data between networks of networks, called internetworks. While the data link layer uses hardware addresses within a single segment of a network, the network layer uses logical addresses and hos...

The upper layers of the OSI model just store collections of functions used commonly to interface between software applications and the Transport layer. The Session layer (Layer 5) is responsible for exchanging messages between a client and a server, and this s...

An unshielded twisted pair cable category that supports up to 40 Gbps. Cat 8 also includes Cat 8.1 and Cat 8.2. Description 2000 MHz RJ45-Connector (except Cat 8.2, which uses GG45/TERA) Limits 40 Gbps speeds to max cable lengths of 30 meters.

An unshielded twisted pair cabling category that supports up to 10 Gbps. Description 600 MHz GG45/TERA connector Limits 10Gbps speeds to max cable lengths of 100 ft.

A type of fiber optic cable that uses multiple central cores in order to facilitate multiplex transmission. MMF cables have a larger core then their counterpart, (50 or 62.5 microns) and a shorter wavelength (850 or 1300 mm vs 1310 or 1550 mm). MMF uses less e...

A form of WDM that transmit and receive data over the same strand of fiber cabling. It uses slightly shifted wavelengths to distinguish between Tx (1310 nm) and Rx (1490 nm) signals. BiDi transceivers must be installed in opposite pairs, so the downstream tran...

A form of WDM that supports up to 16 different wavelengths, used to deploy four or eight bidirectional channels over a single fiber strand or two parallel lanes.

A type of WDM that provisions a bigger number of channels (20-160 in increments of 20). There is much less spacing between each channel and it requires much more precise and expensive lasers. Dense WDM requires opposite pair transceivers.

The loss of signal strength over a network medium. Attenuation is measured in decibels (dB), which is a ratio between two measurements - the signal strength at the origin (where it's the strongest) and the signal strength at the destination. dB represents th...