What is the transmission efficiency of a 1,000-byte file sent in response to a Web request...

 

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What is the transmission efficiency of a 1,000-byte file sent in response to a Web request HTTP, TCP/IP, and Ethernet? Assume that the HTTP packet has 100 bytes in addition to the 1,000-byte file. Hint: that efficiency = user data/total transmission size. Calculate a single transmission efficiency number from the perspective of the 1,000-Byte file. Use the following assumptions: - 1,000 Bytes for size of user data file - 100 Bytes for size of HTTP header - "Typical" size for TCP header (including the options field) - Default size for IPV4 header (including the options field) - For the Ethernet overhead, assume that "Ethernet 802.3ac" is used. Use the figure below to figure out the size of Ethernet 802.3ac overhead Bytes. Assume that VLAN is used. Assume that the size of the Ethernet 802.3ac Control field is 2 Bytes DSAP SSAP Data Frame Check Sequence Start of Destination Source VLAN Length Control Preamble Frame Address Address Tag 7 1 6 6 4 2 1 1-2 46-1,500 bytes byte bytes bytes bytes bytes byte byte bytes bytes bytes FIGURE 4-8a Ethernet 802.3ac frame layout What is the transmission efficiency of a 1,000-byte file sent in response to a Web request HTTP, TCP/IP, and Ethernet? Assume that the HTTP packet has 100 bytes in addition to the 1,000-byte file. Hint: that efficiency = user data/total transmission size. Calculate a single transmission efficiency number from the perspective of the 1,000-Byte file. Use the following assumptions: - 1,000 Bytes for size of user data file - 100 Bytes for size of HTTP header - "Typical" size for TCP header (including the options field) - Default size for IPV4 header (including the options field) - For the Ethernet overhead, assume that "Ethernet 802.3ac" is used. Use the figure below to figure out the size of Ethernet 802.3ac overhead Bytes. Assume that VLAN is used. Assume that the size of the Ethernet 802.3ac Control field is 2 Bytes DSAP SSAP Data Frame Check Sequence Start of Destination Source VLAN Length Control Preamble Frame Address Address Tag 7 1 6 6 4 2 1 1-2 46-1,500 bytes byte bytes bytes bytes bytes byte byte bytes bytes bytes FIGURE 4-8a Ethernet 802.3ac frame layout

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