Shared Flashcard Set

Details

CCNAX
Certification study
32
Computer Networking
Undergraduate 4
07/25/2014

Additional Computer Networking Flashcards

 


 

Cards

Term

Gateway Load Balancing Protocol

(GLBP)

Definition
is a Cisco proprietary solution to allow automatic selection and simultaneous use of multiple available gateways in addition to automatic failover between those gateways.
Term
HSRP standby router
Definition
The function of the router is to monitor the operational status of the HSRP group and to quickly assume packet-forwarding responsibility if the active router becomes inoperable
Term
HSRP active router
Definition

Responds to default gateway ARP requests with the virtual router MAC address

 

Assumes active forwarding of packets for the virtual router

 

Sends hello messages

 

Knows the virtual router IP address

 
Term

Active

(show glbp)

Definition
indicates that this router is responsible for responding to ARP requests for the virtual IP address
Term

Listen

(show glbp)

Definition
indicates that the router is receiving hello packets and is ready to be activated if the currently active router fails
Term

HSRP

 

Definition

a Cisco-proprietary redundancy protocol for establishing a fault-tolerant default gateway

 

defines a standby group of routers, with one router as the active router. 

Term
show license udi
Definition

Displays all the unique device identifier (UDI) values that can be licensed on the system

 
Term
UDI information
Definition

This information is needed to purchase upgrades at a later time, transfer licenses, and lookup licenses.

 
Term
show license
Definition

Displays detailed information 

    about all feature licenses.

 

Type of license

Evaluation or Permanent

 

Actual usage time of the license

Time used and left in the evaluation 

 
Term
show license feature
Definition

Displays the current list of all features on the router & which are enabled.

 
Term
universal image
Definition
contains all of the features capable on the specific device, but may not be activated by default.  Additional features may require the purchase of additional licenses to activate.
Term
Anycast address
Definition

Can be assigned to several interfaces/devices.

 

A packet sent to this address goes only to the nearest member of the group, according to the routing protocols measures of distance.

 

Described as a cross between a Unicast and Multicast.

 

Packet is only delivered to a single device

Term
Link-local address
Definition

Designed for use on a single local link and are automatically configured on all interfaces.

 

The prefix used is FE80::X/10

 

Routers do not forward packets with a destination and source address containing __________

Term
Rapid commit
Definition
DHCP client obtains configuration parameters from the server through a quick two message exchange (solicit and reply).
Term
normal commit
Definition
DHCP client uses four message  exchanges (solicit, advertise, request and reply).
Term
eui-64 command
Definition
a host can automatically assign itself a unique 64-bit IPv6 interface identifier without the need for manual configuration or DHCP.
Term
Duplicate Address Detection (DAD)
Definition
used to verify no one else on the network is using the address that you created
Term
Stateless Address Autoconfiguration (SLAAC)
Definition

Requires no manual configuration of hosts, minimal (if any) configuration of routers, and no additional servers. 

 

DHCP clients autoconfigure their own IPv6 address based on router advertisements. Routers advertise prefixes that identify the subnet(s) associated with a link, while hosts generate an "interface identifier" that uniquely identifies an interface on a subnet.

DHCP clients uses the DHCP server to obtain the other useful configuration information (such as the address of DNS servers).

 

This approach is used when a network is not concerned with the exact addresses hosts use on a network so long as they are unique and routable. 

 
Term
floating static route
Definition
a static route that the router uses to back up dynamic route.
Term
link state routing protocols
Definition
a routing protocol that makes its routing decisions based on the state of the links that connect source and destination devices
Term
The ipv6 ospf process-id area area-id command
Definition
command will enable the routing process and its associated configuration to be created but network statements are no longer used.
Term
show commands for OSPFv3
Definition

Show ipv6 ospf neighbor

Show ipv6 ospf database

Show ipv6 route

Show ipv6 protocols

Term
internal router (IR)
Definition
A router that has every interface in the same area
Term
Area Border Router (ABR)
Definition

 – A router that has an interface in multiple areas and generates summary LSAs. It connects one or more areas to the main backbone network.

 
Term
Autonomous System Border Router (ASBR)
Definition
– A router that is connected to more than one routing protocol or has at least one interface outside of OSPF. Used to distribute routes received from other, external LSAs throughout its own autonomous system
Term
Backbone Router (BR)
Definition

 – A router that is connected to the backbone area.

 
Term
Type 3 LSA
Definition
are referred to as the summary link entries and are created and propagated by ABRs
Term
Type 4 LSA
Definition

summary LSA generated by an ABR only when an ASBR exists within an area

 
Term
Type 5 LSA
Definition
describe routes to networks outside the OSPF autonomous system, originated by the ASBR and are flooded to the entire autonomous system
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