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What is OSPF adjacencies?
OSPF is a link-state routing protocol that helps Routers exchange IP routes. OSPF Adjacencies is the established "neighborship" between two OSPF routers in order to make the exchange of routes. In this case, Adjacency means the same as "peering", that the OSPF speakers (routers) are able to "talk" to each other.
What three parameters must be identical between OSPF routers in order to form an adjacency?
area id hello interval network type
What OSPF packets will trigger the reset of the Dead Time counter?
packets
Compare and contrast the advertisements by RIP and OSPF?
RIP is an Interior Gateway Protocol and the most widely accepted routing protocol. It is also known by the name of the Unix daemon program routed. RIP is straightforward: it arranges to have routers to broadcast their entire current routing database periodically OSPF is a link-state algorithm. OSPF specifies a class of messages called link-state advertisements (LSAs) that allow routers to update each other about the LAN and WAN links to which they are connected. When a change is made to the network, LSAs flow between routers. OSPF routers receive link-state updates and store them in a topology database in memory. OSPF networks as an end-station-to-router protocol. OSPF addresses all the deficiencies of RIP, without affecting connectivity to RIP based networks.
What factor does the Cisco implementation of OSPF use to pick the best route?
Bandwidth
What is backbone area in OSPF?
In OSPF (Open Shortest Path First), the backbone area is designated as Area 0. It serves as the central hub for routing information exchange between other OSPF areas, ensuring efficient communication and route distribution. All other areas must connect to the backbone area, facilitating the proper functioning of OSPF and maintaining a hierarchical network structure. If an area cannot connect directly to Area 0, it is required to use virtual links to establish that connectivity.
How many maximum routers supported by OSPF area?
OSPF (Open Shortest Path First) can theoretically support up to 250 routers in a single area. However, the practical limit is often lower, typically around 50 to 60 routers per area, to maintain optimal performance and reduce overhead. It's recommended to design OSPF networks with fewer routers per area to enhance stability and manageability.
When was Southeast Area Transit created?
Southeast Area Transit was created in 1975.
What is the difference between OSPF and IS-IS and which one is preferred?
OSPF requires an area 0, while IS-IS does not. Like OSPF, IS-IS uses areas when designing the network. However, IS-IS does not require and area 0 like OSPF does. Because IS-IS was originally designed for non-IP protocols, it can more easily support IPv6 routing. Preference is relative to the size of the network. OSPF (a network layer protocol) is more often used in medium to large enterprise networks because of it's special tunnelling features. IS-IS is often used in VERY large ISP networks because of its stability features and the fact that it can support more routers.
When was Sarasota County Area Transit created?
Sarasota County Area Transit was created in 1979.
When was Hillsborough Area Regional Transit created?
Hillsborough Area Regional Transit was created in 1980.
When was Capital Area Transit - Harrisburg - created?
Capital Area Transit - Harrisburg - was created in 1973.
When was Charlotte Area Transit System created?
Charlotte Area Transit System was created in 1999.
When was Memphis Area Transit Authority created?
Memphis Area Transit Authority was created in 1975.
When was Housatonic Area Regional Transit created?
Housatonic Area Regional Transit was created in 1972.
When was Tompkins Consolidated Area Transit created?
Tompkins Consolidated Area Transit was created in 1998.
What is ospf throttle?
OSPF LSA throttling helps the dampening of LSA updates in OSPF during times of network instability.
