Ethernet frame: A highly structured collection of information presented in a specific order
Ethernet: The protocol most widely used to send data across individual links
EtherType field: It follows the Source MAC Address in a dataframe. It's 16 bits long and used to describe the protocol of the contents of the frame
Exterior gateway: Protocols that are used for the exchange of information between independent autonomous systems
F
Fiber cable:Fiber optic cables contain individual optical fibers which are tiny tubes made of glass about the width of a human hair. Unlike copper, which uses electrical voltages, fiber cables use pulses of light to represent the ones and zeros of the underlying data
FIN_WAIT: A TCP socket state indicating that a FIN has been sent, but the corresponding ACK from the other end hasn't been received yet
FIN: One of the TCP control flags. FIN is short for finish. When this flag is set to one, it means the transmitting computer doesn't have any more data to send and the connection can be closed
Firewall:It is a device that blocks or allows traffic based on established rules
Five layer model: A model used to explain how network devices communicate. This model has five layers that stack on top of each other: Physical, Data Link, Network, Transport, and Application
Fixed allocation: Requires a manually specified list of MAC address and the corresponding IPs
Flag field: It is used to indicate if a datagram is allowed to be fragmented, or to indicate that the datagram has already been fragmented
Fragmentation offset field: It contains values used by the receiving end to take all the parts of a fragmented packet and put them back together in the correct order
Fragmentation: The process of taking a single IP datagram and splitting it up into several smaller datagrams
Frame check sequence:It is a 4-byte or 32-bit number that represents a checksum value for the entire frame
