Term
| Distance-vector Routing Protocol |
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Definition
| It requires that a router informs its NEIGHBORS of topology changes periodically. |
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Term
| Link-state Protocol & it's characteristics |
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Definition
It requires a router to inform all the NODES in a network of topology changes.It maintains a full database of distant routers & how they interconnect.
1)Routing Table
2)Link-state Advertisement (LSA)
3)Topology Database
4)Shortest Path First (SPF) algorithm |
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Term
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Definition
| A device such as a computer, router or switch attached to a computer or telecommunications network. Or a point in a network topology where lines intersect. |
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Term
| RIP & it's characteristics |
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Definition
Routing Information Protocol
Distance-vector routing standard that uses hop count as a routing matrix.Defines a hop count greater than 15 as an unreachable route. Sends routing table every 30 seconds. |
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Term
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Definition
| Is manually configured by the net admin. and doesn't change until the admin. reconfigures it. These routes are identified in the routing table with the prefix S |
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Term
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Definition
| Automatically created & maintained by routing protocols. Routing protocols exchange routing info with other routers. They are identified in the routing table with the prefix that corresponds to the type of routing protocol that created the route. Example, R is used for protocol RIP. |
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Term
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Definition
| A type of static route that specifies the gateway to use when the routing table does not contain a path for the destination network. It's common for it to be the next router in the path to the ISP. If subnet only has 1 router that router is automatically the the default gateway. (Gateway of last resort) |
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Term
| What is the term used when all the routers in a network have updated their tables to reflect the new route? |
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Definition
| The routers are said to have "Converged". |
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Term
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Definition
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Term
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Definition
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Term
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Definition
| Interior Gateway Protocol |
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Term
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Definition
| Exterior Gateway Protocol |
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Term
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Definition
| Autonomous System - a collection of routers under a common admin that presents a common clearly defined routing policy to the Internet. Ex. large company's internal network & an ISP's network. |
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Term
| What are the two types of routing protocols for the Internet? |
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Definition
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Term
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Definition
| Updates that are sent out after there has been a change to the network. These are sent independently of regularly scheduled updates. |
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Term
| EIGRP & it's characteristics |
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Definition
| Cisco-proprietary, enhanced distance vector routing protocol. Uses a variety of metrics to total the cost of a route. Combines next hop & metric with additional database & update features. Has max hop count of 224 hops. |
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Term
| Name the two database tables used by EIGRP |
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Definition
| Neighbor Table & Topology Table |
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Term
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Definition
| Diffused Update Algorithm - used in EIGRP & provides loop-free operation. Allows routers in a topology change to synchronize at the same time while not involving routers that are unaffected. |
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Term
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Definition
| Link-state Advertisement. Small packet of routing info that is sent between routers & describes the state of the links of a router & other info such as IP address of each link. |
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Term
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Definition
| Collection of information gathered from all the LSAs received by the router. |
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Term
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Definition
| Shortest Path First - Calculation from database info that results in the SPF tree. This info is used to build the routing table. |
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Term
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Definition
| Open Shortest Path First - is a non-proprietary, link-state routing protocol described in RFC 2328. |
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Term
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Definition
1)Uses SPF Algorithm to calculate the lowest cost to destination
2)Sends routing updates (LSAs) ONLY when topology changes(no periodic)
3)Provides fast convergence
4)Supports Variable Length Subnet Mask & discontiguous subnets
5)Provides route authentication |
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Term
| What are the Metrics used in IP routing protocols? |
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Definition
Hop Count
Bandwidth
Load
Delay
Reliability
Cost |
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Term
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Definition
| Administrative Distance - The trustworthiness of a route. The lower the AD the more stable the route. |
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Term
True or False
You can have multiple routing protocols on a network. |
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Definition
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Term
True or False
Small networks with only one gateway to the Internet can't use static routes. |
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Definition
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Term
True or False
RIP is a good choice for a network with 17 routers |
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Definition
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Term
| What are the 4 main criteria to consider when choosing a routing protocol? |
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Definition
Ease of management
Ease of configuration
Efficiency
Size of organization |
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Term
| What are the 3 commands to remember for basic RIPv2 configuring? |
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Definition
Router(config)#router rip
Router(config)#version 2
Router(config)#network [network_number] |
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Term
| show ip protocols command when using RIP |
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Definition
| Verifies that RIP routing is configured, that the correct interfaces are sending & receiving RIP updates, & that router is advertising the correct networks. |
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Term
| show ip route command when using RIP |
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Definition
| Shows routing table which verifies that the routes received by RIP neighbors are installed in the routing table. |
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Term
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Definition
| Can be used to watch the nets advertised in the routing updates as they are sent & received. Debug commands display router activity in real time. |
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Term
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Definition
| Autonomous Systems -Group of networks under a common administration sharing a common routing strategy.Autonomous systems are subdivided by areas. An autonomous system must be assigned a unique 16-bit number by IANA. AS systems help make up the Internet. |
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Term
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Definition
| Autonomous System Number - A unique identifier for the AS networks. The same ASN applies to all network devices within the AS routing domain. |
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Term
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Definition
| Interior Gateway Protocols - used to exchange routing info within an AS or individual organization. It helps find the best path through the internal network. IGPs run on routers inside an org. Examples are RIP, EIGRP, & OSPF |
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Term
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Definition
| Exterior Gateway Protocols - are designed to exchange route info between different AS. They serve as translators for ensuring that external route info gets successfully interpreted inside each AS network. They run on exterior routers. |
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Term
| Border Gateways or Boundary Routers |
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Definition
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Term
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Definition
| Border Gateway Protocol - The most common exterior routing protocol on the Internet today. |
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Term
| On the Internet what is Local Traffic? |
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Definition
| Traffic that is carried within an AS that either originated in that same AS, or is intended to be delivered within that AS. |
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Term
| On the Internet what is Transit Traffic? |
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Definition
| Traffic that was generated outside an AS and can travel through the internal AS network to be delivered to destinations outside the AS. |
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Term
| What commands are used to enable BGP? |
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Definition
C1>enable
C1#config t
C1(cinfig)#router brp [as number]
C1(config-router)#neighbor [IP_address] remote-as [AS_number]
C1(config-router)#network [network_address]
C1(config-router)#end
C1#
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Term
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Definition
| Customer Premises Equipment |
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Term
| What should BGP NEVER be used to advertise? |
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Definition
| A private network address |
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Term
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Definition
| Mean Time Between Failure- Measure of equipment fault tolerance & based on tests performed at the time of manufacture. |
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Term
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Definition
| Mean Time To Repair - established by warranty or service agreement. |
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Term
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Definition
| The five-9's standard of availability. |
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Term
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Definition
| Synchronization Message - It indicates the intention of the TCP source host to establish a connection with the destination host to send data. It synchronizes the TCP sequence numbers between the two hosts, so they can keep track of the segments sent & received. |
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Term
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Definition
| Synchronization Acknowledgement Message - TCP receiving host sends reply message to the SYN message. |
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Term
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Definition
| Acknowledge Message - TCP sending hosts acknowledges the SYN-ACK message was received and completes the connection setup. |
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Term
| What is the SYN, SYN-ACK, ACK activity between TCP processes on two hosts called? |
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Definition
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Term
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Definition
| Application Specific Integrated Circuit |
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Term
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Definition
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Term
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Definition
| Subnetwork Access Protocol |
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Term
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Definition
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