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ITIS 3110 Network Auditing

ITIS 3110 Network Auditing

ITIS 3110 Network Auditing. overview. networking refresh protocols refresh. hubs. Hubs are dumb devices that simply act as a repeater They may amplify incoming packets and retransmit to all attached devices Hubs essentially provide a shared medium All devices see all packets. hubs.

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754 views • 58 slides
802.11 Medium Access Control (MAC) Specification

802.11 Medium Access Control (MAC) Specification

802.11 Medium Access Control (MAC) Specification. Contents. The MAC Service and Functions MAC Addressing Fragmentation Carrier Sense Mechanisms Channel Access Protocols Distributed Coordination Function (DCF) Point Coordination Function (PCF) Enhanced MAC for Quality of Service (802.11e)

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729 views • 58 slides
Dynamic Adaption of DCF and PCF mode of IEEE 802.11 WLAN

Dynamic Adaption of DCF and PCF mode of IEEE 802.11 WLAN

MTech Dissertation. Dynamic Adaption of DCF and PCF mode of IEEE 802.11 WLAN. Abhishek Goliya 01329012 Guided By: Prof. Sridhar Iyer Dr. Leena-Chandran Wadia. 15 th January 2003. Aim. To optimize overall performance of IEEE 802.11 MAC in WLAN

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517 views • 33 slides
MAC Layer Protocols for Wireless Networks

MAC Layer Protocols for Wireless Networks

MAC Layer Protocols for Wireless Networks. What is MAC?. MAC stands for M edia A ccess C ontrol . A MAC layer protocol is the protocol that controls access to the physical transmission medium on a LAN.

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472 views • 23 slides
Proposed Changes to the 802.11e D1.0 Draft

Proposed Changes to the 802.11e D1.0 Draft

Proposed Changes to the 802.11e D1.0 Draft. Mathilde Benveniste AT&T Labs, Research. Inter-frame Spaces and Backoff Procedure. Figure 49 - Some IFS Relationships. AIFS[j]. AIFS[i]. Immediate access when. Medium is free >= DIFS/AIFS[i]. DIFS/AIFS. Contention Window. DIFS/AIFS. PIFS.

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191 views • 17 slides
EEE521

EEE521

EEE521. Computer and Data Communications Semester 2 2011-2012 Mohd Nazri Mahmud Session 2b-29 Feb 2012. OBSERVATIONS. OBSERVATIONS

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278 views • 15 slides
Example Solutions

Example Solutions

Example Solutions. Example 1. Random backoff = r A = 0. DIFS =2. Packet length = 10. A. 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25. ACK=1. ACK=1. SIFS=1. SIFS=1. Answer: T = 24. B. 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25. DIFS =2.

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91 views • 3 slides

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