Q25

Host A (on TCP/IP v4 network A) sends an IP datagram D to host B (also on TCP/IP v4 network B). Assume that no error occurred during the transmission of D. When D reaches B, which of the following IP header field(s) may be different from that of the original datagram D? $\text{i}$ only $\text{i}$ and $\text{ii}$ only $\text{ii}$ and $\text{iii}$ only $\text{i, ii}$ and $\text{iii}$