What is the area of OSPF?

An OSPF network can be divided into sub-domains called areas. An area is a logical collection of OSPF networks, routers, and links that have the same area identification. A router within an area must maintain a topological database for the area to which it belongs.

What is OSPF in networking?

Open Shortest Path First (OSPF) is a routing protocol for Internet Protocol (IP) networks. It uses a link state routing (LSR) algorithm and falls into the group of interior gateway protocols (IGPs), operating within a single autonomous system (AS).

What is the use of backbone area in OSPF?

OSPF networks in an autonomous system (AS) are administratively grouped into areas. All interfaces on internal routers are directly connected to networks within the area. The central area of an AS, called the backbone area, has a special function and is always assigned the area ID 0.0.0.0.

What is the difference between ABR and Asbr?

ABR is a router used to establish a connection between backbone area and other OSPF areas. ASBR is a router that is connected to other OSPF areas, as well as other routing protocols such as IGRP, EIGRP, IS-IS, RIP, BGP, Static.

What are LSA types?

OSPF LSA Types Explained

  • LSA Type 1: Router LSA.
  • LSA Type 2: Network LSA.
  • LSA Type 3: Summary LSA.
  • LSA Type 4: Summary ASBR LSA.
  • LSA Type 5: Autonomous system external LSA.
  • LSA Type 6: Multicast OSPF LSA.
  • LSA Type 7: Not-so-stubby area LSA.
  • LSA Type 8: External attribute LSA for BGP.
  • What is the ABR in OSPF?

    An area border router (ABR) is a kind of router that is located near the border between one or more Open Shortest Path First (OSPF) areas. It is used to establish a connection between backbone networks and the OSPF areas.

    What is the virtual link in OSPF?

    All areas in an Open Shortest Path First (OSPF) autonomous system must be physically connected to the backbone area (Area 0). In some cases, where this is not possible, you can use a virtual link to connect to the backbone through a non-backbone area. You can read more about virtual links in the OSPF Design Guide.

    What is OSPF multi area?

    By default, an interface can only belong to one OSPF Area. When Multi-Area Adjacency is configured on an interface, the OSPF speakers form more than one Adjacency (ADJ) over that link. The Multi-Area interface is a logical, point-to-point interface over which the ADJ is formed.

    What is a transit area in OSPF?

    In short, this is a special property of a non-backbone area that allows this area to transport traffic for other areas (either zero or non-zero). Per the OSPF definition, a transit area is the area that has a virtual-link connecting two or more ABRs attached to this area.

    What is a virtual link?

    A virtual link is not a physical link. It is a logical link using the least cost path between the ABR of the non-backbone connected area and the backbone ABR of the transit area. A virtual adjacency across the virtual link is formed, and routing information is exchanged.

    What is an internal router?

    Internal Router. Routing devices that connect to only one OSPF area are called internal routers. All interfaces on internal routers are directly connected to networks within a single area.

    What are the basic components of a router?

    The basic components of any Cisco router are :

  • Interfaces.
  • The Processor (CPU)
  • Internetwork Operating System (IOS)
  • RXBoot Image.
  • RAM.
  • NVRAM.
  • ROM.
  • Flash memory.
  • What are the primary functions of a router?

    A router is a networking device that forwards data packets between computer networks. Routers perform the traffic directing functions on the Internet. A data packet is typically forwarded from one router to another router through the networks that constitute an internetwork until it reaches its destination node.

    What is the difference between a router and a modem?

    What is the difference between a router and a modem? In order for devices on the network to connect to the Internet, the router must be connected to a modem. Therefore, most routers have a specific Ethernet port that is designed to connect to the Ethernet port of a cable or DSL modem.

    What is the function of NIC?

    The NIC contains the electronic circuitry required to communicate using a wired connection (e.g., Ethernet) or a wireless connection (e.g., WiFi). A network interface card is also known as a network interface controller, network adapter, or Local Area Network (LAN) adapter.

    What does a WAP do?

    A wireless access point (WAP) is a hardware device or configured node on a local area network (LAN) that allows wireless capable devices and wired networks to connect through a wireless standard, including Wi-Fi or Bluetooth.

    What is the NIC driver?

    The software that controls the network hardware — specifically, the network interface card (NIC) — is a driver. Rarely do you need to update this software. In fact, a routine or security update is included with the standard Windows Update. But you can upgrade a NIC driver manually if you must.

    What does the NIC do?

    Short for Network Interface Card, the NIC is also referred to as an Ethernet card and network adapter. It is an expansion card that enables a computer to connect to a network; such as a home network, or the Internet using an Ethernet cable with an RJ-45 connector.

    What is a driver in a network?

    Network device driver. Updated: 04/26/2017 by Computer Hope. A network device driver is a device driver that enables a network device to communicate between the computer and operating system as well as with other network computers and network devices.