Data Communication Reviewer
Reviewer DataCom: Chapter 1-5
Chapter 1:
Intranet- Restricted group on a company and only allows internal employee access.
Extranet- Type of network that allows outside vendors special access to limited info in a company.
Protocols- Rules of communication. * An identified sender and receiver * An agreed-upon method of communicating * Common language and grammar * Confirmation or acknowledgement requirements
Elements of a Network: * Rules or agreements: protocols or how the message is semt, directed, received and interpreted. * Massages: units of info that travels * Medium: means of interconnecting these devices, can transport the messages * Devices: devices on the network exchange messages
Messages- a generic term that encompasses forms of communication enabled by the Internet.
Devices- several devices work to see that the message is properly directed to the source to the destination device.
Icons- symbols that graphically presents network devices and media. * Desktop Computer * Laptop * Server – a computer dedicated to providing app services * IP Phone – a digital phone * LAN media * Wireless media * LAN switch – most common device for interconnect LANs * Firewall – provides security to networks * Router – helps direct messages between networks * Wireless router * Cloud – summarize a group of networking devices * WAN media
IP (Internet Protocal) & TCP (Transmission Control Protocol) – most common protocols * WWW – HTTP * E-mail – SMTP * Instant messae – XMPP * IP telephony – SIP
Convergence – coming together of technologies onto a digital platform. It occurs when computer communications all use the same rules to transport their messages.
Network Architecture – the conceptual plans on which a physical network is built. * Fault tolerance- needs to function even if some components fail * Scalability- network’s ability to grow & react to future
Chapter 1:
Intranet- Restricted group on a company and only allows internal employee access.
Extranet- Type of network that allows outside vendors special access to limited info in a company.
Protocols- Rules of communication. * An identified sender and receiver * An agreed-upon method of communicating * Common language and grammar * Confirmation or acknowledgement requirements
Elements of a Network: * Rules or agreements: protocols or how the message is semt, directed, received and interpreted. * Massages: units of info that travels * Medium: means of interconnecting these devices, can transport the messages * Devices: devices on the network exchange messages
Messages- a generic term that encompasses forms of communication enabled by the Internet.
Devices- several devices work to see that the message is properly directed to the source to the destination device.
Icons- symbols that graphically presents network devices and media. * Desktop Computer * Laptop * Server – a computer dedicated to providing app services * IP Phone – a digital phone * LAN media * Wireless media * LAN switch – most common device for interconnect LANs * Firewall – provides security to networks * Router – helps direct messages between networks * Wireless router * Cloud – summarize a group of networking devices * WAN media
IP (Internet Protocal) & TCP (Transmission Control Protocol) – most common protocols * WWW – HTTP * E-mail – SMTP * Instant messae – XMPP * IP telephony – SIP
Convergence – coming together of technologies onto a digital platform. It occurs when computer communications all use the same rules to transport their messages.
Network Architecture – the conceptual plans on which a physical network is built. * Fault tolerance- needs to function even if some components fail * Scalability- network’s ability to grow & react to future