SOME COMMUNICATION CONTROLS ARE AS FOLLOWS:
1) Physical Component Controls: The physical components shall have characteristics that make them reliable and incorporate features and controls that mitigate the possible effects of exposures Major physical components that affect the reliability of communication subsystem are Transmission media, Communication lines, Modem, Port protection devices, Multiplexers, and Concentrators etc.
2) Line Error Control: Whenever data is transmitted over a communication line, remember that it can be received in error because of noise that occurs on the line. These errors must be detected and corrected.
3) Flow Controls: Flow controls are needed because two nodes in a network can differ in terms of the rate at which they can be sent, receive, and process data. For example- data transmission between mainframe and microcomputers may become erroneous because of difference in their speed and storage capacity. Flow controls will be used therefore to prevent the mainframe flooding the microcomputer and as a result, data being lost.
4) Link Controls: In Wide Area Network (WAN), line error control and flow control are important functions in the component that manages the link between two nodes in a network. The way these link- management components operate is specified via a protocol.
5) Topological Controls: A communication network topology specifies the location of nodes within a network, the ways in which these nodes will be linked, and the data transmission capabilities of the links between the nodes. The network must be available for use at any one time by a given number of users.
6)Internetworking Controls: Different internetworking devices like bridge, router, gateways are used to establish connectivity between homogeneous or heterogeneous networks. Therefore, several control functions in terms of access control mechanisms, security and reliability of the networks are required to be established.
