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Nt1310 Unit 1 Question Paper

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Words 1497
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Name: Sri Sai Ankit Basava
UIN: 651426641 Homework-11

1. What are the SSIDs of the two access points that are issuing most of the beacon frames in this trace?
Ans: An SSID is a one or two word identifiers of the access point. In my packet trace Cisco-Li’s SSID is 30 Munroe St, and LinksysG_67:22:94’s SSID is linksys12.

2. What are the intervals of time between the transmission of the beacon frames the linksys_ses_24086 access point? From the 30 Munroe St. access point? (Hint: this interval of time is contained in the beacon frame itself).
Ans: Approximately 0.1024 seconds.

3. What (in hexadecimal notation) is the source MAC address on the beacon frame from 30 Munroe St? Recall from Figure 6.13 in the text …show more content…
Find the 802.11 frame containing the SYN TCP segment for this first TCP session (that downloads alice.txt). At what time is the TCP SYN sent? What are three MAC address fields in the 802.11 frame? Which MAC address in this frame corresponds to the wireless host (give the hexadecimal representation of the MAC address for the host)? To the access point? To the first-hop router? What is the IP address of the wireless host sending this TCP segment? What is the destination IP address? Does this destination IP address correspond to the host, access point, first-hop router, or some other network-attached device? Explain. (Hint: review Figure 5.19 in the text if you are unsure of how to answer this question, or the corresponding part of the next question. It’s particularly important that you understand …show more content…
At t = 63.169071 there is an AUTHENTICATION from sent in the reverse direction from the BSS to the wireless host.

14. Let’s continue on with the association between the wireless host and the 30 Munroe St AP that happens after t = 63.0. An ASSOCIATE from host to AP, and a corresponding ASSOCIATE RESPONSE frame from AP to host are used for the host to associated with an AP. At what time is there an ASSOCIATE REQUEST from host to the 30 Munroe St AP? When is the corresponding ASSOCIATE REPLY sent? (Note that you can use the filter expression “wlan.fc.subtype < 2 and wlan.fc.type == 0 and wlan.addr == IntelCor_d1:b6:4f” to display only the ASSOCIATE REQUEST and ASSOCIATE RESPONSE frames for this trace.)
Ans: At t = 63.169910 (packet no: 2162) there is an ASSOCIATE REQUEST frame sent from 00:13:02:d1:b6:4f (the wireless host) to 00:16:b7:f7:1d:51 (the BSS). At t = 63.192101 there is an ASSOCIATE RESPONSE that is sent in the reverse direction from the BSS to the wireless

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