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A computer network diagram is a schematic depicting the nodes and connections amongst nodes in a computer network or, more generally, any telecommunications network. Computer network diagrams form an important part of network documentation.
12 early ISA 8 bit and 16 bit PC network cards. The lower right-most card is an early wireless network card, and the central card with partial beige plastic cover is a PSTN modem. Intel Ophir 82571 dual-port Gigabit Ethernet controller die. Network controllers were originally implemented as expansion cards that plugged into a computer bus.
The Cisco 2500 series routers are a series of 19" rack mount access routers typically used to connect Ethernet or Token Ring networks via ISDN or leased serial connections (i.e. Frame Relay, T1 etc.).
A rollover cable (also known as a Yost cable, Cisco cable, or a console cable) is a type of null-modem cable that is used to connect a computer terminal to a router's console port. This cable is typically flat (and has a light blue color) to help distinguish it from other types of network cabling.
A converged network adapter (CNA), also called a converged network interface controller (C-NIC), is a computer input/output device that combines the functionality of a host bus adapter (HBA) with a network interface controller (NIC).
Cisco ASR 9000 series routers are routers designed for the service provider market. It runs the IOS XR Linux-based operating system. [6] Its major characteristics are: IOS XR uses a less verbose configuration syntax compared to Cisco IOS and Cisco IOS XE; Designed for Metro Ethernet networks; Designed for video and other high bandwidth applications
Where there is a need for a great deal of analysis of network performance and security, switches may be connected between WAN routers as places for analytic modules. Some vendors provide firewall , [ 21 ] [ 22 ] network intrusion detection , [ 23 ] and performance analysis modules that can plug into switch ports.
The routers in an Ethernet or Frame Relay network select a designated router (DR) and a backup designated router (BDR) which act as a hub to reduce traffic between routers. OSPF uses both unicast and multicast transmission modes to send "hello" packets and link-state updates.