IT283__Unit_2_Assignement.docx IPv4 and IPv6 Headers Purdue University Global Part 1: 1.A. The textbook, “Guide to TCP/IPâ€, describes the Type of Service (TOP) field to consist of 2 components, Precedence an
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IT283__Unit_2_Assignement.docx IPv4 and IPv6 Headers Purdue University Global Part 1: 1.A. The textbook, “Guide to TCP/IPâ€, describes the Type of Service (TOP) field to consist of 2 components, Precedence and Type of Service. Precedence is established in the initial 3 bits and used by routers to set priority on network traffic in the routers queues. Type of Service is determined in the 4 following bits and it determines the path type the routers must use. The final bit in the TOP is reserved and set to 0. (Tittel et al. 2012. p.111) B. Briefly defined by the textbook, “Guide to TCP/IPâ€, Time to Live (TTL) is the remaining distance a packet can travel. This field indicates the number of hops performed by a packet through routers to reach its destination. The most common starting TTL values are 32, 64, 128 with a max of 225, but it is possible for the TTL time to be greater or less than the starting value. (Tittel et al. 2012. p. 118) C. The Protocol field as explained by the textbook “Guide to TCP/IPâ€, is a field that shows what is coming up next. Common Protocol field numbers examples are 1 for ICMP, 2 for IGMP, 6 for TCP, 17 for UDP, 92 for MTP and 115 for L2TP. This field has other number ranges assigned for specific purposes, such as 253 and 254 are for experimental purposes, 143-252 are unassigned, and 255 is reserved for IANA. (Tittel et al. 2012. p. 118-199) D. In the textbook “Guide to TCP/IPâ€, the Header Checksum field provides error-detection on only the IP header and n. . . . . .. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .. . .. .. . . . . . . . . . . . . . . . . . .. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
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