7.2.1 Enabling and Verifying RIPv2
RIPv2 is the configured routing protocol on the routers in a network. The command Router(config-router)# no version 2 is entered on
the routers. The effect that entering this command will have on routing updates is that
Media interconnects two nodes
Nodes DONT share the media with other hosts
Data Link layer protocols have little to do for controlling non-shared media
The devices can both transmit and receive on the media bu
11.5.1 Redistributing an OSPF Default Route
Refer to the exhibit. The "O*E2" from the "O*E2
0.0.0.0/0 [110/1] via 192.168.1.1, 00:05:34, Serial0/0/1"
line represents an external OSPF route that will not
increment in cost.
11.3.1 OSPF Metric
Refer to the e
network can be physically connected via a number of intermediate devices.
In some cases, the logical connection between nodes forms what is called a virtual circuit.
A virtual circuit is a logical connection created within a network between two network
Creating a Frame
A frame is a key element of each Data Link Layer protocol.
The Data Link layer protocols require control information to enable
the protocols to function.
The control information can tell:
Which nodes are in communication with each other
A family of networking technologies that are defined in the IEEE 802.2 and 802.3
Define both the Layer 2 protocols and the Layer 1 technologies
Most widely used LAN technology
Has many fields
Structure is identical fo
The Data Link layer provides a means for exchanging data over a
common local media.
The Data Link layer performs two basic services:
Allows the upper layers to access the media using techniques such
Controls how data is placed onto the media a
Data Link protocols add a trailer to the end of each frame. The trailer is
used to detect if the frame arrived without error.
The Frame Check Sequence (FCS) field is used to determine if errors
occurred in the transmission and reception of the individual
8.1.4 Parent and Child Routes: Classful Networks
A route to a destination network is learned from multiple routing protocols. If each learned route has the same network prefi x,
administrative distance is used by a Cisco router to select the preferred rou