Use LEFT and RIGHT arrow keys to navigate between flashcards;
Use UP and DOWN arrow keys to flip the card;
H to show hint;
A reads text to speech;
10 Cards in this Set
- Front
- Back
|
No reordering of packets, uses 1st in, 1st out (FIFO) queuing, packets emptied in order they were received. Not Strict |
Best Effort |
|
|
Often refered to as hard QoS because it makes strict bandwidth reservations. Uses RSVP (resource reservation protocol). Because it must be configured on every router along the packets path, it suffers from a lack of scalability. |
Integrated Services (IntServ) |
|
|
Differentiates between multiple traffic flows, packets are marked, then routers and switches can make decisions based on those markings. Soft QoS, most modern configurations are based on this. Less strict |
Differentiated services (DiffServ) |
|
|
The process of placing traffic into different categories. Does not alter bits. |
Classification |
|
|
Alters bits to indicate how the network should treat the traffic. Other tools reference the alterations and then make decisions on how to act. |
Marking |
|
|
An attempt to to buffer an overflow of traffic that is being received faster than it can be transmitted. Queuing. |
Congestion Management |
|
|
Uses Random Early Detection (RED) to prevent tail dropping (discarding new packets once the queue is filled). Can be configured for min and Max threshold levels before tail dropping occurs. |
Congestion Avoidance |
|
|
Can be used in either the inbound or outbound direction, and typically discards packets that exceed the configured rate limit. Because it drops packets, resulting in retransmissions, it is recommended for higher speeds. Uses bytes as a unit of measure. |
Policing |
|
|
Buffers (delays) traffic exceeding a configured rate. Recommended for slow speeds. Uses bits as a unit of measure. |
Shaping |
|
|
Using compression to make the most of limited bandwidth links. Fragments large packets and Interleaves smaller packets. |
LFI (Link Fragmentation and Interleaving) |
