Routing
This is the form of routing that is manually added to the routing table and only changes if edited by the administrator.
What is Static Routing?
Algorithm used by routing protocols that select a forwarding path based on the next hop router with the lowest hop count to the destination network.
What is distance vector?
Distance vector-based routing protocol that uses a hop count to determine the least-cost path to a destination network.
What is Routing Information Protocol?
Maps private host IP addresses onto a single public IP address. Each host is tracked by assigning it a random high TCP port for communications.
What is Port Address Translation (PAT)?
Backbone link established between switches and routers to transport frames for multiple virtual LANs (VLANs).
What is trunking?
Entry in the routing table to represent the fowarding path that will be used if no other entries are matched.
This is a special type of static route that identifies the next hop router for a destination that cannot be matched by another routing table entry.
What is a Default Route?
Process whereby routers agree on routes through the network to establish the same network topology in their routing tables (steady state). The time taken to reach steady state is a measure of a routing protocol's convergence performance.
What is convergence?
Advanced distance vector dynamic routing protocol using bandwidth and delay metrics to establish optimum forwarding paths.
What is Enhanced IGRP (EIGRP)?
Routing mechanism that conceals internal addressing schemes from the public Internet by translating between a single public address on the external side of a router and private, non-routable addresses internally.
What is Network Address Translation (NAT)?
Troubleshooting issue where a routing table does not contain a required entry due either to manual misconfiguration or failure of a dynamic routing protocol update.
What is a missing route?
Counter field in the IP header recording the number of hops a packet can make before being dropped.
What is TTL?
Path vector exterior gateway routing protocol used principally by ISPs to establish routing between autonomous systems. Path selection is based on multiple metrics such as hop count, weight, local preferences, and origin.
What is Border Gateway Protocol (BGP)?
Accepting or denying traffic based on its source and/or destination IP address.
What is IP Filtering?
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Command tools used in router operating systems to list the contents of routing tables.
What is show route?
What is show ip route?
What is show ipv6 route?
Group of network prefixes under the administrative control of a single organization used to establish routing boundaries.
What is Autonomous System (AS)?
Dynamic routing protocol that uses a link-state algorithm and a hierarchical topology.
What is Open Shortest Path First (OSPF)?
A network that uses a combination of physical or logical topologies. In practice most networks use hybrid topologies. For example, modern types of Ethernet are physically wired as stars but logically operate as buses.
What is hybrid topology?
What is an example of a broadcast domain?
A group of computers separated by a switch to the router
The mechanism for splitting a layer 3 datagram between multiple frames to fit the maximum transmission unit (MTU) of the underlying Data Link network.
What is fragmentation?
What is each port on a router considered?
A separate network requiring its own subnet.
Metric determining the trustworthiness of routes derived from different routing protocols.
What is administrative distance?
The principles of this are access, distribution, and core.
Paradigm to simplify network design by separating switch and router functionality and placement into three tiers each with a separate role, performance requirements, and physical topology.
What is three-tiered hierarchy?
This is a network protocol used primarily in wired networks, such as Ethernet. It operates in the Medium Access Control (MAC) layer and is effective after a collision has occurred.
What is Carrier Sense Multiple Access with Collision Detection (CSMA/CD)?