Basics
CSMA persistence
A carrier-sense/multiple-access transmission strategy is said to be nonpersistent if, when the line is busy, the sender waits…
July 22, 2021 · Rajil TLBasics
Basics
Errors
Packets can have bits flipped or garbled by electrical noise on the cable; estimates of the frequency with…
July 22, 2021 · Rajil TLBasics
Hubs and topology
Ethernet hubs (multiport repeaters) change the topology, but not the fundamental constraints. Hubs enabled the model in which…
July 22, 2021 · Rajil TLBasics
Capture effect
The capture effect is a scenario illustrating the potential lack of fairness in the exponential backoff algorithm. The…
July 21, 2021 · Rajil TLBasics
Exponential Backoff Algorithm
Whenever there is a collision the exponential backoff algorithm – operating at the MAC layer – is used…
July 21, 2021 · Rajil TLBasics
Ethernet delay budget
The total here is 220 bits; in a full accounting it would be 232. Some of the numbers…
July 21, 2021 · Rajil TLBasics
The Slot Time and Collisions
The diameter of an Ethernet is the maximum distance between any pair of stations. The actual total length…
July 21, 2021 · Rajil TLBasics
The LAN Layer
The LAN layer, at its upper end, supplies to the network layer a mechanism for addressing a packet…
July 21, 2021 · Rajil TLBasics
Ethernet Address Internal Structure
The second-to-lowest-order bit of a physical Ethernet address indicates whether that address is believed to be globally unique…
July 21, 2021 · Rajil TLBasics
Ethernet Multicast
Another category of Ethernet addresses is multicast, used to transmit to a set of stations; streaming video to…
July 21, 2021 · Rajil TL