Connecting to and Setting Up an Network Chapter 14

802.11 a/b/g/n/ac

The collective name for the IEEE 802.11 standards for local wireless networking, which is the technical name for Wi-Fi.

Default Gateway

The gateway a computer on a network uses to access another network unless it knows to specifically use another gateway for quicker access to that network.

Client Server Computer Name

Two computers communicating using a local network or the Internet. One computer (the client) makes requests to the other computer (the server), which answers the request.

Anycast Address

Using TCP/IP version 6, a type of IP address used by routers and identifies multiple destinations. Packets are delivered to the closest destination.

Automatic Private IP Address (APIPA)

In TCP/IP version 4, IP address in the address range 169.254.x.y, used by a computer when it cannot successfully lease an IP address from a DHCP server.

DHCPv6 server

A DHCP server that serves up IPv6 addresses.

Connectionless Protocol

A TCP/IP protocol such as UDP that works at the OSI Transport layer and does not guarantee delivery by first connecting and checking where data is received. It might be used for broadcasting, such as streaming video or sound over the web, where guaranteed delivery is not as important as fast transmission. Also called a best-effort protocol. Also see UDP (User Datagram Protocol).

DHCP Client

A computer or other device (such as a network printer) that requests an IP address from a DHCP server.

CIFS (Common Internet File System)

A file access protocol and the cross-platform version of SMB used between Windows, Linux, Mac OS, and other operating systems. Also called SMB2.

CDMA (Code Division Multiple Access)

A protocol standard used by cellular WANs and cell phones for transmitting digital data over cellular networks.

DHCP (Dynamic Host Configuration Protocol)

A protocol used by a server to assign a dynamic IP address to a computer when it first attempts to initiate a connection to the network and requests an IP address.

CIDR Notation

A shorthand notation (pronounced "cider notation") for expressing an IPv4 address and subnet mask with the IP address followed by a / slash and the number of bits in the IP address that identifies the network. For example, 15.50.35.10/20.

Channel

A specific radio frequency within a broader frequency.

Connection Oriented Protocol

In networking, a TCP/IP protocol that confirms a good connection has been made before transmitting data to the other end, verifies data was received, and resends it if it is not. An example of a connection-oriented protocol is TCP.

Beamingforming

A technique supported by the IEEE 802.11ac Wi-Fi standard that can detect the location of connected devices and increase signal strength in that direction.

AES (Advanced Encryption Standard)

An encryption standard used by WPA2 and is currently the strongest encryption standard used by Wi-Fi.

AFP (Apple Filing Protocol)

An outdated file access protocol used by early editions of the Mac operating system by Apple and is one protocol in the suite of AppleTalk networking protocols.

Apple Talk

An outdated suite of networking protocols used by early editions of the Apple Mac OS, and has been replaced by the TCP/IP suite of protocols.

Address Reservation

When a DHCP server assigns a static IP address to a DHCP client. For example, a network printer might require a static IP address so that computers on the network can find the printer.

Destination Network Address Translation (DNAT)

When a firewall using Network Address Translation (NAT) allows uninitiated communication to a computer behind the firewall through a port that is normally closed. Also see port forwarding.