ABSTRACT To deploy well-designed computer networks supporting converged applications of data, audio, and video. To support better performance, resilience, security, maintainability. This is to propose a network model that can be implemented in different network environments and also be used to implement MAN, WAN. Use of Voice over Internet Protocol technology allows to make a phone call using an Internet connection or a dedicated network that uses the IP protocol, rather than go through the normal telephone line. This save bandwidth used. Data packets, containing voice information are routed over the network, encoded in digital form. To filters & check unauthorized traffic that travels across the network. The major objective of this network design is to allow only the genuine users to access the network and prevent the intruders from accessing it.
NETWORK TOPOLOGY
Network description This network has a total number of 3 locations locations; 1 Head office,and other two are Branch office-A and Branch Office-B. The routers used are 2811 Also have opted for 2960 switches Have added PC's as voice functionality can be added to those if desired and to check whether both the network could ping each other or not and for various operational functionalities. Have kept IPV4 addressing sceme to the various networks. The Head office and the Branch office-A are connected via leased line(Frame Relay).
Frame-Relay Frame relay is a telecommunication service designed for cost-efficient data transmission for intermittent traffic between local area networks (LANs) and between end-points in a wide area network (WAN). Frame relay puts data in a variable-size unit called a frame and leaves any necessary error correction (retransmission of data) up to the end- points, which speeds up overall data transmission.
RIP(ROUTING INFORMATION PROTOCOL) It is a dynamic routing protocol technique RIP prevents routing loops by implementing a limit on the number of hops allowed in a path from the source to a destination. The maximum number of hops allowed for RIP is 15.
VLAN In computer networking, a single layer-2 network may be partitioned to create multiple distinct broadcast domains, which are mutually isolated so that packets can only pass between them via one or more routers; such a domain is referred to as a Virtual Local Area Network, Virtual LAN or VLAN.
TELNET Telnet is a user command and an underlying TCP/IP protocol for accessing remote computers. Through Telnet, an administrator or another user can access someone else's computer remotely.
ACL(Access Control lists) ACLs are basically a set of commands, grouped together by a number or name that is used to filter traffic entering or leaving an interface. An access control list (ACL) is a table that tells a computer operating system which access rights each user has to a particular system object.
