The three bit "Flags" field in IPv4 header indicates fragmentation possibilities. The first bit is unused and should always have a value of zero. The next bit is called the DF (Don't Fragment) flag. DF flag set to "0" indicate that the IPv4 Datagram can be fragmented and DF set to ...
IPv4 fragmentation breaks a datagram into pieces that are reassembled later. The IPv4 source, destination, identification, total length, and fragment offset fields, along with "more fragments" (MF) and "do not fragment" (DF) flags in the IPv4 header, are used for IPv4 fragmentation and re...
An IPv4 datagram consists of a header and a data field. The first 20 bytes in the header are mandatory for all IPv4 datagrams. The Options field following the 20 bytes has a variable length. Table 1-4 describes the meaning of each field in an IPv4 packet. Table 1-4 Description of eac...
originalIndicates that the value of the Traffic Class field in the IPv6 field of the IPv6 tunnel header uses the value in Traffic Class field of the original packet.- class-valueSpecifies the traffic level of the IPv4 over IPv6 tunnel.The value is an integer that ranges from 0 ...
The shaded fields of the IPv4 packet header are not included in the IPv6 packet header. Figure 4. IPv4 Packet Header Format The basic IPv6 packet header has 8 fields with a total size of 40 octets (320 bits). Fields were removed from the IPv6 hea...
TCP MSS clamping limits the value of the Maximum Segment Size (MSS) in the TCP header of TCP SYN packets transiting a specified Ethernet or tunnel interface. Setting the MSS ceiling can avoid IP fragmentation in tunnel scenarios by ensuring that the MSS is low enough to account for the extra...
The network layer header of any IPv4 packet sent from a source node to a destination node on an IPv4 internetwork includes the following: A source IPv4 address, which contains a source network ID and a source host ID. A destination IPv4 address, which contains a destination network ID and ...
IPv4 binary bits are separated by a dot(.), whereas IPv6 binary bits are separated by a colon(:). IPv4 offers 12 header fields, whereas IPv6 offers 8 header fields. IPv4 supports broadcast, whereas IPv6 doesn’t support broadcast. ...
However, we’d need to assign 47 octillion addresses per person on Earth to run out of IPv6. Packet Header Structure IPv4 and IPv6 packets are like envelopes that carry data across the internet. Just like envelopes, they have a header that contains important information for delivery. However...
FragmentsWhen a packet is too big for the next link over which it is to travel, it can be fragmented by the sender (host or router).For IPv6, fragmentation can only occur at the source node, and reassembly is only done at the destination node. The fragmentation extension header is used...