lesson 6 Flashcards
1
Q
traditional nonconverged network characteristics
A
- bursty data flow
- fifo access
- not overly time sensitive
- brief outages are survivable
2
Q
converged network realities
A
- constant small packet voice flow competes with bursty data flow
- critical traffic must have priority
- voice and video are time sensitive
- outages are not acceptable
3
Q
converged network quality issues
A
- lack of bandwidth
- end to end delay
- variation of delay
- packet loss
4
Q
advanced queuing techniques
A
- weighted fair queue (wfq)
- priority queuing (pq)
- custom queuing (cq)
- modified deficit round robin (mdrr)
- class-based weighted fair queue (cb-wfq)
5
Q
types of delay
A
- processing delay, router examining packet
- queuing delay, packet waiting in output queue
- serialization delay, time it takes to put the bits on the wire
- propagation delay, time it takes for packet to cross the link
6
Q
types of packet drops
A
- tail drops, full output queue
- input drop, router congestion
- ignore, router congestion
- overrun, router congestion
- frame error, router congestion
7
Q
voip performance requirements
A
- latency, 150 ms one way
- jitter, less than 100 ms
- packet loss, less than 1%
8
Q
qos metrics
A
- delay
- jitter
- packet loss
9
Q
live voice and video qos sensitivities
A
- delay
- jitter
- packet loss
10
Q
streaming video and audio qos sensitivities
A
- jitter
- packet loss
11
Q
transactional/interactive application qos sensitivities
A
-delay
12
Q
bulk data, email, file transfer qos sensitivities
A
-none
13
Q
qos tools
A
- congestion management
- queue management
- traffic shaping and policing
14
Q
fifo
A
- first in first out queuing
- stores packets when the network is congested and forwards them in order of arrival when congestion is relieved
15
Q
pq
A
- priority queuing
- puts data into four queue levels (high, medium, normal (*default), low)
