Acronyms
DLCI
Mapping
Advanced
FLASH
100
NBMA
What is non-broadcast multiple access?
100
DLCIs are used to identify this?
What are virtual circuits (VCs)?
100
This uses Inverse ARP to populate an address-to-DLCI mapping table on the FR router.
What is dynamic mapping?
100
These are the three LMI types supported by Cisco routers.
What are Cisco, ANSI, and Q933A?
100
These are the two major criteria that constitute the cost of a Frame Relay circuit.
What are 'local loop' and 'required bandwidth'?
200
FECN
What is forward explicit congestion notification?
200
This is meant when it is said that a DLCI is locally significant.
What is the DLCI only applies to the connection between the local router and the local frame relay switch?
200
This configures a manual map for the next-hop IP address to a local DLCI.
What is static mapping?
200
The CIR specifies this, which is provided to the customer, and if customer sends info higher than the CIR, it is not guaranteed and is marked with the DE bit.
What is maximum average data rate?
200
A router interface connects to a Frame Relay network over a preconfigured logical circuit that does not have a direct electrical connection from end to end. This type of circuit is being used.
What is PVC?
300
DE
What is discard eligibility?
300
The range of DLCI addresses.
What is 0-1023?
300
This is the function of the Local Management Interface.
What is a keepalive mechanism that provides status information about FR connections between the router (DTE) and FR switch (DCE)?
300
This explains the difference between the Committed Burst Size (Bc) and Excess Burst Size (Be).
What is Bc allows traffic to burst to higher speeds, as available network bandwidth permits. A device can burst up to the Bc and still expect the data to get through. Be describes the bandwidth available above the CIR up to the access rate of the link. Be is not negotiated, frames may be transmitted at this level but are most likely dropped?
300
These can save address space because it uses a single subnet.
What are multipoint subinterfaces?
400
CIR
What is committed information rate?
400
This type of mapping knows the DLCI and sends a request for the destination IP address.
What is Inverse ARP?
400
This explains how is a Frame Relay connection different from that of a Leased Line.
What is 'frame relay requires only a single access circuit to the Frame relay provider to communicate with multiple other sites'?
400
This happens when the DCE sets the BECN bit to 1.
What is 'the sending device is notified of congestion on the network in hopes it will reduce flow of frames'?
400
This is the solution when distance vector routing protocols are unable to forward routing updates back out the incoming interface to other remote routers.
What is 'configuring logical subinterfaces'?
500
ANSI
What is American National Standards Institute?
500
The number of bits in a DLCI address.
What is 10?
500
These act as NBMA so they do not resolve the split horizon issues.
What are multipoint subinterfaces?
500
This happens when the DCE sets the DE bit to 1.
What is 'when there is congestion, these frames will be dropped first'?
500
The [ show frame-relay pvc ] command is best utilized to display the number for these type of packets that are received by the router.
What are FECN and BECN messages?
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