A computer network is the infrastructure that allows two or more computers (called
hosts) to communicate with each other. The network achieves this by providing a set
of rules for communication, called protocols, which should be observed by all
participating hosts. The need for a protocol should be obvious: it allows different
computers from different vendors and with different operating characteristics to
‘speak the same language’.
This chapter introduces the fundamental concepts of computer networks.
DNS architecture is a hierarchical distributed database and an associated set of protocols that define: •A mechanism for querying and updating the database. •A mechanism for replicating the information in the database among servers. •A schema of the database. DNS originated in the early days of the Internet when the Internet was a small network established by the United States Department of Defense for research purposes. The host names of the computers in this network were managed through the use of a single HOSTS file located on a centrally administered server....
This book attempts to provide a unified overview of the broad field of data and computer communications.
The organization of the book reflects an attempt to break this massive subject
into comprehensible parts and to build, piece by piece, a survey of the state of the art.The book
emphasizes basic principles and topics of fundamental importance concerning the technology
and architecture of this field and provides a detailed discussion of leading-edge topics.
The following basic themes serve to unify the discussion:...
TCAP Testing The TCAP specification is found in ITU Q.787 . The purpose of the tests is to ensure validation and compatibility of an SP's TCAP protocol according to ITU Q.771–775 [82–86], to a reasonable but not exhaustive degree
Summary ISUP provides a rich network interface to call processing at an SSP. The increased bandwidth and protocol standardization allow a greater range of services that are able to interwork both within a network and across network boundaries
MTP 2 Testing The MTP 2 test specification is found in ITU Q.781 . The purpose of the tests is to ensure complete validation and compatibility of an SP's MTP 2 protocol according to ITU Q.703 .
SS7 Protocol Overview The number of possible protocol stack combinations is growing. It depends on whether SS7 is used for cellular-specific services or intelligent network services, whether transportation
ANSI Protocol Message Contents The following sections describe the set of ANSI messages, the fields included in each, and specify the mandatory and optional fields for each message type. The message types specified by ANSI include
Summary TCAP provides a standard mechanism for telephony services to exchange information across the network. It is designed to be generic so it can interface with a variety of services. TCAP resides at Level 4 of the SS7 protocol
Interfaces and Protocols The previous section introduced GSM network architecture, and this section introduces the SS7/C7 protocols that are used. It also discusses interfaces, because different protocols are used
Interfaces and Protocols The previous section introduced GSM network architecture, and this section introduces the SS7/C7 protocols that are used. It also discusses interfaces, because different protocols
User Adaptation (UA) Layers The User Adaptation (UA) layers encapsulate different SCN signaling protocols for transport over an IP network using SCTP. While each UA layer is unique in terms of the encapsulation
ummary This chapter focused on the key SigTran protocols and their role in a nextgeneration architecture of voice products. The SigTran work grew from a desire to decompose a traditional circuit switch into specialized components. It focused on the following two areas
MTP Level 2 User Adaptation (M2UA) The M2UA protocol defines the layer split between MTP Level 2 and MTP Level 3. M2UA is defined by RFC 3331 . The M2UA protocol can be used between a SG, which is called