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An administrator maps a unique identifier (a client id or MAC address) for each client to an IP address, which is offered to the requesting client. DHCP servers may be configured to fall back to other methods if this fails. DHCP services are used for Internet Protocol version 4 (IPv4) and IPv6.
The DHCP unique identifier (DUID) is used by a client to get an IP address from a DHCPv6 server. It has a 2-byte DUID type field, and a variable-length identifier field up to 128 bytes.
This is a list of the IP protocol numbers found in the field Protocol of the IPv4 header and the Next Header field of the IPv6 header.It is an identifier for the encapsulated protocol and determines the layout of the data that immediately follows the header.
CNR is a DHCP/DHCPv6 server used by cable-based and similar network service providers because of its support for fail-over between redundant servers, Dynamic DNS updates so that DHCP leases are reflected in DNS data, integration with directory services using LDAP Version 3, and ability to handle high request rates. It is also extensible.
In the context of application design, an address pool may be the availability of a set of addresses (IP address, MAC address) available to an application that is shared among its users, [2] or available for allocation to users, such as in host configurations with the Dynamic Host Configuration Protocol (DHCP).
More commonly addresses are assigned by a DHCP server, often built into common networking hardware like computer hosts or routers. Most IPv4 hosts use link-local addressing only as a last resort when a DHCP server is unavailable. An IPv4 host otherwise uses its DHCP-assigned address for all communications, global or link-local.
IEEE 802.1Q, often referred to as Dot1q, is the networking standard that supports virtual local area networking (VLANs) on an IEEE 802.3 Ethernet network. The standard defines a system of VLAN tagging for Ethernet frames and the accompanying procedures to be used by bridges and switches in handling such frames.
EtherType is a two-octet field in an Ethernet frame.It is used to indicate which protocol is encapsulated in the payload of the frame and is used at the receiving end by the data link layer to determine how the payload is processed.