front 1 The smallest representation of data that a computer can understand | back 1 Bit |
front 2 A protocol by which routers share data with each other | back 2 Border Gateway Protocol (BGP) |
front 3 A type of Ethernet transmission, sent to every single device on a LAN | back 3 Broadcast |
front 4 A special destination used by an Ethernet broadcast composed by all Fs | back 4 Broadcast address |
front 5 Groups of cables that are made with the same material. Most network cables used today can be split into two categories, copper and fiber | back 5 Cable categories |
front 6 Insulated wires that connect different devices to each other allowing data to be transmitted over them | back 6 Cables |
front 7 is used to determine when the communications channels are clear and when the device is free to transmit data | back 7 Carrier-Sense Multiple Access with Collision Detection (CSMA/CD) |
front 8 A device that receives data from a server | back 8 Client |
front 9 A network segment where only one device can communicate at a time | back 9 Collision Domain |
front 10 The full scope of how computers communicate with each other | back 10 Computer Networking |
front 11 These categories have different physical characteristics like the number of twists in the pair of copper wires. These are defined as names like category (or cat) 5, 5e, or 6, and how quickly data can be sent across them and how resistant they are to outside interference are all related to the way the twisted pairs inside are arranged | back 11 Copper Cable Categories |
front 12 When an electrical pulse on one wire is accidentally detected on another wire | back 12 Crosstalk |
front 13 A mathematical transformation that uses polynomial division to create a number that represents a larger set of data. It is an important concept for data integrity and is used all over computing, not just network transmissions | back 13 Cyclical Redundancy Check (CRC) |
front 14 An all-encompassing term that represents any single set of binary data being sent across a network link | back 14 Data Packet |
front 15 The layer in which the first protocols are introduced. This layer is responsible for defining a common way of interpreting signals, so network devices can communicate | back 15 Datalink layer |
front 16 The hardware address of the intended recipient that immediately follows the start frame delimiter | back 16 Destination MAC address |
front 17 A form of communication where information can flow in both directions across a cable | back 17 Duplex communication |
front 18 The protocol most widely used to send data across individual links | back 18 Ethernet |
front 19 A highly structured collection of information presented in a specific order | back 19 Ethernet frame |
front 20 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 | back 20 EtherType field |
front 21 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 | back 21 Fiber Cable |
front 22 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 | back 22 Five Layer Model |
front 23 It is a 4-byte or 32-bit number that represents a checksum value for the entire frame | back 23 Frame Check Sequence |
front 24 The capacity of devices on either side of a networking link to communicate with each other at the exact same time | back 24 Full Duplex |
front 25 It means that, while communication is possible in each direction, only one device can be communicating at a time | back 25 Half Duplex |
front 26 A way to represent numbers using a numerical base of 16 | back 26 Hexadecimal |
front 27 It is a physical layer device that broadcasts data to every computer connected to it | back 27 Hub |
front 28 The most common protocol used in the network layer | back 28 Internet Protocol (IP) |
front 29 A company that provides a consumer an internet connection | back 29 Internet Service Provider (ISP) |
front 30 A collection of networks connected together through routers - the most famous of these being the Internet | back 30 Internetwork |
front 31 Modulation used for computer networks | back 31 Line Coding |
front 32 A single network in which multiple devices are connected | back 32 Local Area Network (LAN) |
front 33 A globally unique identifier attached to an individual network interface. It's a 48-bit number normally represented by six groupings of two hexadecimal numbers | back 33 MAC(Media Access Control) address |
front 34 A way of varying the voltage of a constant electrical charge moving across a standard copper network cable | back 34 Modulation |
front 35 If the least significant bit in the first octet of a destination address is set to one, it means you're dealing with a multicast frame. A multicast frame is similarly set to all devices on the local network signal, and it will be accepted or discarded by each device depending on criteria aside from their own hardware MAC address | back 35 Multicast frame |
front 36 It's the layer that allows different networks to communicate with each other through devices known as routers. It is responsible for getting data delivered across a collection of networks | back 36 Network Layer |
front 37 The physical connector to be able to connect a device to the network. This may be attached directly to a device on a computer network, or could also be located on a wall or on a patch panel | back 37 Network Port |
front 38 It is a level 2 or data link device that can connect to many devices so they can communicate. It can inspect the contents of the Ethernet protocol data being sent around the network, determine which system the data is intended for and then only send that data to that one system | back 38 Network switch |
front 39 Any device connected to a network. On most networks, each node will typically act as a server or a client | back 39 Node |
front 40 Any number that can be represented by 8 bits | back 40 Octet |
front 41 The first three octets of a MAC address | back 41 Organizationally Unique Identifier (OUI) |
front 42 A model used to define how network devices communicate. This model has seven layers that stack on top of each other: Physical, Data Link, Network, Transport, Session, Presentation, and Application | back 42 OSI mode |
front 43 A device containing many physical network ports | back 43 Patch Panel |
front 44 The actual data being transported, which is everything that isn't a header | back 44 Payload |
front 45 It represents the physical devices that interconnect computers | back 45 Physical layer |
front 46 The first part of an Ethernet frame, it is 8 bytes or 64 bits long and can itself be split into two section | back 46 Preamble |
front 47 A defined set of standards that computers must follow in order to communicate properly is called a protocol | back 47 Protocol |
front 48 A device that knows how to forward data between independent networks | back 48 Router |
front 49 A device that provides data to another device that is requesting that data, also known as a client | back 49 Server |
front 50 A form of data communication that only goes in one direction across a cable | back 50 Simplex communication |
front 51 The hardware address of the device that sent the ethernet frame or data packet. In the data packet it follows the destination MAC address | back 51 Source MAC address |
front 52 The last byte in the preamble, that signals to a receiving device that the preamble is over and that the actual frame contents will now follow | back 52 Start Frame Delimiter (SFD) |
front 53 The data transfer protocol most commonly used in the fourth layer. This protocol requires an established connection between the client and server | back 53 Transmission Control Protocol (TCP) |
front 54 The network layer that sorts out which client and server programs are supposed to get the data | back 54 Transport layer |
front 55 The most common type of cabling used for connecting computing devices. It features pairs of copper wires that are twisted together | back 55 Twisted pair cable |
front 56 A unicast transmission is always meant for just one receiving address | back 56 Unicast transmission |
front 57 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 | back 57 User Datagram Protocol (UDP) |
front 58 It is a technique that lets you have multiple logical LANs operating on the same physical equipment | back 58 Virtual LAN (VLAN) |
front 59 A piece of data that indicates what the frame itself is. In a data packet it is followed by the EtherType | back 59 VLAN header |