iSCSI terminology

Learn how the iSCSI terms apply to your storage array.

Term Description
CHAP The Challenge Handshake Authentication Protocol (CHAP) method validates the identity of targets and initiators during the initial link. Authentication is based on a shared security key called a CHAP secret.
Controller A controller consists of a board, firmware, and software. It controls the drives and implements the System Manager functions.
DHCP Dynamic Host Configuration Protocol (DHCP) is a protocol used on Internet Protocol (IP) networks for dynamically distributing network configuration parameters, such as IP addresses.
IB InfiniBand (IB) is a communications standard for data transmission between high-performance servers and storage systems.
ICMP PING response Internet Control Message Protocol (ICMP) is a protocol used by operating systems of networked computers to send messages. ICMP messages determine whether a host is reachable and how long it takes to get packets to and from that host.
IQN An iSCSI Qualified Name (IQN) identifier is a unique name for an iSCSI initiator or iSCSI target.
iSER iSCSI Extensions for RDMA (iSER) is a protocol that extends the iSCSI protocol for operation over RDMA transports, such as InfiniBand or Ethernet.
iSNS Internet Storage Name Service (iSNS) is a protocol that allows automated discovery, management, and configuration of iSCSI and Fibre Channel devices on TCP/IP networks.
MAC address Media access control identifiers (MAC addresses) are used by Ethernet to distinguish between separate logical channels connecting two ports on the same physical transport network interface.
Management client A management client is the computer where a browser is installed for accessing System Manager.
MTU A Maximum Transmission Unit (MTU) is the largest size packet or frame that can be sent in a network.
RDMA Remote Direct Memory Access (RDMA) is a technology that allows network computers to exchange data in main memory without involving the operating system of either computer.
Unnamed discovery session When the option for unnamed discovery sessions is enabled, iSCSI initiators are not required to specify the target IQN to retrieve the controller's information.