| FCS |
The extra checksum characters added to a frame in a communication protocol for error detection. Except if stated otherwise, this is used in the context of Ethernet frames. |
| Back-to-back |
Communication from one port to another without other devices |
| BBP |
ByteBlower Project |
| ByteBlower Client |
A system controlling one or more ByteBlower servers. |
| ByteBlower GUI |
The Graphical user interface of ByteBlower. This Java based application can be installed on one or more computers, and can be used to perform traffic testing from one or more ByteBlower servers. |
| ByteBlower Server |
A server developed by Excentis to perform network tests. It can generate and analyse traffic to measure different performance parameters like throughput, packet loss, latency and jitter. |
| ByteBlower Switch |
Network switch configured to be used in combination with ByteBlower to increase the number of traffic ports. |
| CIDR |
Classless Inter-Domain Routing. A mehtod to for allocation IP addresses and routing IP frames. It replaces the previous classful network design. |
| CRC |
an error-detecting code commonly used in digital networks and storage devices to detect accidental changes to raw data |
| DHCP |
The Dynamic Host Control Protocol is a client-server networking protocol. The DHCP server provides configuration parameters like an IP address, default gateway, ... specific to the DHCP client host requesting information to participate on an IP network. |
| DIX |
Ethernet frame format specification. Version 2 is the most common frame format for ethernet frames. Other frame formats are SNAP and IEEE 802.2 LLC. |
| DUT |
Acronym for Device Under Test |
| Flow |
Traffic pattern between a sending ByteBlower port and one or more destionation ByteBlower ports. |
| Flow Template |
Template for a Flow. It contains the type of frames, speed parameters, ... |
| Frame |
A data packet as transmitted on the wire |
| Frame size modifier |
An option defining that a frame should change size throughout a flow |
| Frameblasting |
Traffic generation model which predefines the frames which will be sent. |
| Framelength |
Length of the frame. This is the lenght of the Ethernet frame, excluding the 4 CRC bytes. |
| HTTP |
HyperText Transport Protocol. Protocol used for the communication on the World Wide Web. |
| HTTP client |
System initiating a HTTP session. |
| HTTP server |
System listening of incoming HTTP requests. |
| IANA (Internet Assigned Numbers Authority) |
The Internet Assigned Numbers Authority (IANA) is the entity that oversees global IP address allocation, DNS root zone management, and other Internet protocol assignments. It is operated by ICANN. |
| ICANN (Internet Corporation for Assigned Names and Numbers) |
The tasks of ICANN include managing the assignment of domain names and IP addresses. To date, much of its work has concerned the introduction of new generic top-level domains. The technical work of ICANN is referred to as the IANA function; the rest of ICANN is mostly concerned with defining policy. |
| IFG |
See Inter Frame Gap |
| IGMP (Internet Group Management Protocol) |
The Internet Group Management Protocol is a communications protocol used to manage the membership of Internet Protocol multicast groups. IGMP is used by IP hosts and adjacent multicast routers to establish multicast group memberships. |
| interface |
A physical network card in the server |
| Inter Frame Gap |
Time between two frames. The time is calculated from start-to-start (start of a Frame to the start of the subsequent Frame) |
| IP |
Internet Protocol. Two major versions are used nowaday: IPv4 and IPv6. |
| MLD (Multicast Listener Discovery) |
Multicast Listener Discovery is the protocol used in the IPv6 protocol suite by a router to discover listeners for a specific multicast group. It is the evolution of IGMP for IPv6. |
| multicast |
Sending to multiple devices simultaneously |
| Non-trunk |
A ByteBlower port that sends data directly |
| port |
Abstraction of an interface by ByteBlower |
| PPPoE |
Point-to-Point protocol over Ethernet. Protocol often used in DSL setups. It encapsulates PPP frames over Ethernet, and is commonly used for authentication. |
| scenario |
Multiple actions the ByteBlower server will execute one by one |
| Sequence tag |
Bytes added to a frame containing the number of the frame in a flow |
| SUT (System Under Test) |
The collective set of network devices to which stimulus is offered as a single entity and response is measured. In many situations, you are interested to test a part of a network. In this case, you are testing a complete system, and we have a SUT. |
| TCP (Transmission Control Protocol) |
The Transmission Control Protocol provides connections between two applications over which they can exchange data. The protocol garantees reliable and in-order delivery of sender to receiver data. The protocol number in the IP-layer for TCP is 6. |
| Time tag |
Bytes added to a frame containing the send time |
| TOS |
Type Of Service. Bitfields used in the IP header to indicate the type of service, so that intermediate routers can decide which frames have high priority, can be dropped or delayed, ... |
| trunk |
A ByteBlower port connected to a switch that can send data through every port of that switch |
| TTL |
Time to live, the number of hops a packet may survive |
| UDP (User Datagram Protocol) |
The User Datagram protocol provides a procedure for application programs to send messages to other programs with a minimum ofprotocol mechanism. The protocol is transaction oriented, and delivery and duplicate protection are not guaranteed. The protocol number in the IP-layer for UDP is 17 (=0x11). |
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