(9pt, IPv4 fragmentation) Consider sending a 600-byte datagram into a link that has an MTU of 500 bytes. Assume the header length of IP datagram is 20 bytes. Suppose the original datagram is stamped with the identification number 12. length to fragflag offset =4000 :12 ver head. type of len service 16-bit total length fragment 16-bit identifier flgs offset (13-bit) time to upper header live layer checksum 32 bit source IP address 32 bit destination IP address (a) (Ipt) How many fragments are generated? (b) (8pt) List the length, identification number, fragment offset, and fragmentation flag for each fragment. (6pt, IPv6 non-fragmentation) IPv6 does not allow fragmentation at routers. Suppose datagrams are limited to 1500 bytes (including header) between source host A and destination host B. Assuming a 20-byte TCP header and a 40-byte IPv6 header, how many datagrams would be required to send an MP3 consisting of 14500 bytes? length ID fragflag offset length ID fragf flog loffset One large datagram becomes several smaller datagrams