BROCADE IP PRIMER

GlossaryFrame This is the data unit of the Data Link Layer. In Ethernet, it is typically1,518 bytes long (including the header).FTP File Transfer Protocol. This is a Layer 7 protocol that provides the ability totransmit and receive files over the network.Full-duplex This is a method of communication over a medium that providessimultaneous transmitting and receiving of data.Full Router This describes a version of software for Brocade switches that providesthe full range of Layer 3 functionality. This version provides all thefeatures of Base Layer-3 code, but adds OSPF, BGP, NAT, PBR, and many morefeatures.FWLB Firewall Load Balancing. Using ServerIrons, this is the process of loadbalancing inbound and outbound traffic through multiple firewalls. This greatlyexpands the capacity of the firewalls.Gateway A gateway is a network device that provides a path from one subnetinto another. This device is often a router, and will often have one interface ineach subnet.GBIC Gigabit Interface Converter. This is a module that decides which medium(e.g., copper, fiber, long-haul fiber, etc.) the modular gigabit port of a switch willuse.GSLB Global Server Load Balancing. This is a DNS proxy service provided byServerIrons. This allows load distribution and high-availability based on a geographicsite level.Half-duplex This is a method of communication of a medium that providesonly either transmit or receive at any given time. You cannot transmit andreceive at the same time. One must happen, and then the other.Health check This is the process that a ServerIron uses to determine whethera remote server is available to receive incoming connections. The ServerIronprovides a health check at Layer 3, Layer 4, and Layer 7.Hello Many protocols use a "hello" protocol to discover its participants and tokeep communication with them. OSPF uses a hello protocol to discover neighborsand maintain link state.Helper address A helper address is an address configured on the gatewayaddress of a subnet. This address acts as a DHCP proxy, so that hosts may beable to avail themselves of a DHCP server's services that is not in the samebroadcast domain.Hexadecimal This is a number system based on the number 16. It has 16 differentdigits: 0,1,2,3,4,5,6,7,8,9,A,B,C,D,E,F. It is commonly used as a higherlevel representation of binary, due to the ease of conversion.Brocade IP Primer 411