Questions tagged [mac]

Not to be confused with mac-address tag, Media Access Control is a sublayer of the OSI data link layer that provides addressing and channel access control mechanisms. It resides between the LLC sublayer and the physical layer.

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How to calculate the data rate in 802.11g? [closed]

I know this is not the community to discuss my homework problem but I cam confused because I cannot find a formula that can find data rate for 802.11g standard given modulation, coding rate and ...
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1k views

MAC address table showing the same MAC address on one port

When I try the sh mac address-table int gi 1/0/19 command: sh mac address-table int gi 1/0/19 Mac Address Table ------------------------------------------- Vlan Mac Address Type ...
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My server can see traffic between other servers

I was troubleshooting one of my servers when I noticed something odd. In the PCAPs I took from my server, I found non-broadcast traffic where my server was neither source or destination. The traffic ...
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73 views

Detecting MAC addresses in a shared medium using WLAN/802.11 features

Say you have 2 WiFi-enabled devices (e.g. 2 smartphones running a Linux-based OS) A and B, within range of each other, and within range of an access point of some WLAN. Both of them have their Wi-Fi ...
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124 views

How many Mac adresses have a switch in output?

I would want to buy a ethernet switch. But I have a question (maybe a noob's question...) that I can't find any answer on the forums... And I hope you will be able to answer. So if I buy an ethernet ...
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249 views

Multiaccess with duplex and multiplexing

If I am correct (correct me if I am wrong): MAC sublayer is all about how to use a multiaccess medium. A multiaccess medium is a medium with multiple communication entities attached to its end(s), ...
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5k views

Point-to-point vs unicast, and multiaccess vs multicast/broadcast?

From Tanenbaum's Computer Networks: Point-to-point links connect individual pairs of machines. To go from the source to the destination on a network made up of point-to-point links, short ...
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1answer
55 views

How does a client know when to wake up and listen to a beacon?

In wireless networking, for power efficiency the access point(AP) sends a beacon to inform the client of pending packets periodically and the client only wakes up every beacon interval (e.g. 100msec) ...
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81 views

MAC Layer Retransmissions during the same TXOP

Back in the day I was messing around with MadWifi and, if I remember properly, after a packet was transmitted if the sender did not receive an ACK in SIFS time after the completion of the transmission,...
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How do Wi-Fi access points discard frames on adjacent channels?

Naturally, Wi-Fi devices (access points, client adapters) receive frames that were sent on an adjacent channel as these overlap, i.e., they 'see' frames that were sent on a channel that the device ...