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Related Flashcards
Cards In This Set
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What is Autonomous System (AS)?
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One or more networks that are governed by a single protocal within that AS. AS's do not use IP addresses, but use a special globally unique Autonomous System Number(ASN) assigned by the IANA.
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What is Border gateway prootocal(BGv-4)?
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The current verssion of the external routing protocol used on the internet. (BGP -4) is used for communications between Autonomous Systems.
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What isCisco IOS
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A proprietary operating system that runs on most Cisco products
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What is Convergence
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A state in whiach all routers within an area are up-to-date, and their routing tables all match
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What is Destination NAT
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A type of Network Address Translation(NAT) in which the destination IP addresses is translated by the NAT -capable router.
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What is Destination port
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A fixed predetermined number assigned to a packet by the sending computer; it defines the function r session type. Destination port numbers are commonly in the range of 0 to 1023.
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Whats is distance vector?
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A routing protocal that calculates the total cost to get to a particular network ID and compares that to the cost to the total cost of all the other routes to get that same network ID. The router then chooses the route with the lowest cost.
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What is a Dynamic Nat?
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A type of network address translation (NAT) in which many computers can share a pool of routable (non-public) IP address that number fewer then the computer.
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What is Dynamic Routing?
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A process by which routers in a network in an internetwork automatically exchange information with all other routers, enabling them to build there own list of routers to various networks.
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What is a Edge Router
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A router used to communicate between Autonomous Systems to corresponding edge routers in other Autonomous Systems.
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What is Enhanced Interior Gateway Routing Protocal(EIGRP)
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Its a Cisco-proprietary protocal developed to work in enterprise-wide routing environments.
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What is a Ephemeral Port?
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An arbitary number assigned to a packet by the sending computer: the recieving computer uses this with the destination address so that the sending computer knows which application to use the returning packet. Common ephemeral port numbers are in the range of 1024-500.
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What is a gateway router
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A router that acts as the default gateway for a number of client computers.
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Whats a hop?
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Its one trip through a router by a packet.
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What is Intermediate System to Intermediate System(IS-IS)
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A link-state dynamic routing protocal(one that announces and forwards individual route changes as they appear), using the concept of areas. Its a major advantage over OSPF(another link-state routing protocal)) is that it is has supported IPv6 from the start. Its not nearly as popular as OSPF.
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