Wired and Wireless Networks

• checksum

  A number used to check if a packet of data sent between networks has been received correctly,
• de-encapsulation


  removing the data from inside an encapsulated item
• domain name server (DNS)


  A server which stores website domain names and their IP addresses.
• dynamic IP address


  An IP address which is automatically assigned to a device before it accesses a network.
• encapsulation


  enclosing the data inside another data structure to form a single component
• FTP (File Transfer Protocol)


  A protocol used to access, edit and move files on another device, like a server.
• HTTP (HyperText Transfer Protocol)


  Used by Web browsers to access websites and communicate with Web servers.
• IMAP (Internet Message Access Protocol)


  A protocol used to retrieve emails from a server.
• Internet Protocol (IP)


  The protocol responsible for packet switching.
• IP address


  A unique identifier given to a device when it accesses an IP network.
• layers


  Groups of protocols that have similar functions.
• layering


  rules organised into a distinct order in which they need to be applied
• MAC address


  A unique identifier assigned to a device during manufacture that cannot be changed.
• packets


  Small, equal-sized units of data used to transfer files over networks.
• payload


  The part of a packet with the actual data.
• POP3


  A protocol used to retrieve emails from a server,
• protocols


  A set of rules for how devices communicate over a network.
• SMTP (Simple Mail Transfer Protocol)

  Used to send emails and transfer emails between servers,
• static IP address


  A permanent IP address,
• TCP/IP

  A set of protocols which dictate how data is sent over the Internet, Made up of Transmission Control Protocol (TCP) and Internet Protocol (IP).
• URL (Uniform Resource locator)


  An address used to access Web servers and resources on them.
• Wi-Fi


  The standard used for wireless connections between devices.
• WIMP


  A GUI based on windows, icons, menus and pointers. 8 wired / wireless networks
• Encryption

  Coding ('encrypting") data so that it can only be decoded ('decrypted') with the correct key.