RFC 1349 redefined bits 3 and 6 (expanding for ToS bits) to reflect a desired type of service optimization. Table 1-5 shows the ToS field …
IPv4 Header 3 – Internet Protocol Version 4 (IPv4) Design
Introduction to IPv6
IPv4 Header 2 – Internet Protocol Version 4 (IPv4) Design
Table 1-3 summarizes the fields of the IP header. Table 1-3 IPv4 Header Fields ToS The Type of Service (ToS) field of the IP header …
NAT – Internet Protocol Version 4 (IPv4) Design
Network Address Translation (NAT) devices convert IP address space into globally unique IP addresses. NAT was originally specified by RFC 1631; the current specification is …
IPv4 Address Subnets – Internet Protocol Version 4 (IPv4) Design
Subnetting plays an important part in IPv4 addressing. The subnet mask helps determine the network, subnetwork, and host part of an IP address. A network …
IP Address Subnet Design Example – Internet Protocol Version 4 (IPv4) Design
The development of an IP address plan or IP address subnet design is an important concept for a network designer. You should be capable of …
Determining the Network Portion of an IP Address – Internet Protocol Version 4 (IPv4) Design
Given an address and a mask, you can determine the classful network, the subnetwork, and the subnetwork’s broadcast number. You do so with a logical …
Case Study: IP Address Subnet Allocation – Internet Protocol Version 4 (IPv4) Design
Consider a company that has users in several buildings in a campus network. Building A has four floors, and building B has two floors, with …
Address Assignment and Name Resolution – Internet Protocol Version 4 (IPv4) Design
Device network configuration parameters such as IP addresses, subnet masks, default gateways, and DNS server IP addresses can be assigned statically by an administrator or …
DHCP – Internet Protocol Version 4 (IPv4) Design
Dynamic Host Configuration Protocol (DHCP) provides a way to dynamically configure hosts on a network. Based on BOOTP, it is defined in RFC 2131 and …
IPv6 Header – Internet Protocol Version 6 (IPv6) Design
This section covers the field of the IPv6 header. The IPv6 header is simpler than the IPv4 header. Some IPv4 fields have been eliminated or …