Training Course Outline
Data Networking Courses LAN, WAN and VPN Training Courses
Hands On X.25
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Course Duration: 4 Days
Course Code: PDN057
Course Description:
This comprehensive 4 day course will lead you through the key concepts behind the X.25 system, utilising multiple hands on labs to give realistic installation and troubleshooting scenario's.
You will learn how to:
- To evaluate X.25 against frame relay, ISDN and other WAN technologies
- How to interface synchronous and asynchronous systems to an X.25 network
- How to optimise your network for the best performance
- How to set up PADs (Packet Assembler/Disassemblers) to meet your needs
- How to use X.25 to support the Transport layer of OSI
- How to select the correct Transport layer protocol for your requirements
- How to interwork X.25 with other network types
- How to interconnect X.25 networks
- How to use the features and facilities of X.25
Prerequisites:
Delegates should have a basic understanding of data communications concepts and terminology.
This course includes the following modules:
Data Communication Fundamentals
- Synchronous data transmission
- The need for a protocol reference model
- Open systems interconnection
- Data networks in the OSI model
- Connection-oriented and connectionless
- communication
Introduction to Packet Switching
- Types of traffic and the efficient use of capacity
- Alternative approaches – frame relay, ISDN, leased lines
- Applications of packet switching
What is X.25?
- The relationship between X.25 and OSI
- Components of the X.25 standard
- Versions of the X.25 standard
- User model of X.25
Addressing Schemes for X.25 Networks
- E.163 and F.69 for telecommunications
- X.121 for data networks including X.25
- National and international networks
The Physical Layer - X.21 and X.21bis
- The connectors and the pin functions
- Modes of interface operation - leased circuit, direct
- circuit and addressed call
- X.21bis as an alternative approach
The Data Link Layer - HDLC
- High level data link control – LAP and LAP B
- Transparency and bit insertion
- Sequencing and flow control
- Error detection and correction
- The extended mode of operation
- Types of frame and their uses
- The Poll/Final bit and its uses
The Packet Layer and the X.25 Protocol
- OSI primitives for packet switching
- Types of control and data packet
- Call control procedures and negotiation of options
- Datagrams and virtual circuits
- Interrupts, resets and restarts
- Logical channels and logical channel groups
- The end-to-end properties of X.25
The OSI Transport Layer and X.25
- Services provided by the transport layer
- Classes of transport protocol
- Multiplexing and error recovery
- Network types and the place of X.25
- The use of X.25 to support the transport layer
X.25 and the ISDN
- Introduction to the ISDN
- ISDN interfaces and their control
- The use of X.25 to provide the ISDN packet-
- mode service
- Addressing considerations
Packet Assemblers/Dissassemblers (PADs)
- X.3, X.28 and X.29 - the 'Triple-X' standards
- Use of the X.25 'Q' bit
- PAD operation and parameters
- PAD profiles
- The X.28 recommendation
- PAD command and service signals
- Editing as a PAD function
The X.29 Protocol for PAD control
- PAD messages for parameter control
- Break, clear and reselection messages
- Error messages
- Reverse PADs and their application
Network Internal Operation
- Routing and relaying in the X.25 network
- Addressing and internetworking
- Packet switch configuration
- Linking public and private networks
Interworking with Other Networks
- The structure of the ISDN
- Interworking X.25 and the ISDN
- Maximum and minimum integration scenarios
- X.31 Case A and Case B
- PSTN integration - the X.32 recommendation
- User identification methods
- Interconnecting X.25 networks using X.75
- Interworking with SNA
- The place of X.25 in SNA networks
Packet Network Management and Design
- Network management principles
- Measurement and monitoring
- Control of the network
- Network routing strategies
- Service levels and response times
- The use of network modelling techniques to
- establish performance levels
- Simulation methods compared with modelling
Security for X.25 Networks
- Security requirements: threats and counter-measures
- Security standards: X.509, ISO 7498/2
- Physical and technical approaches to security
- Encryption, public keys and digital signatures
- Key certification
Modern Developments in Packet Switching
- Frame relay as a simplified data interface
- Frame relay networks
- Fast packet switching, otherwise known as cell
- relay or ATM
- The transition to broadband communications
Further Uses of X.25
- Private X.25 networks
- International usage of X.25
- Connecting independent X.25 networks
- Connecting LANs with X.25
X.25 Compared with Frame Relay
- Fundamentals of frame relay
- Committed Information Rate (CIR)
- Infrastructure requirements
- Situations to avoid
X.25 Compared with Leased Lines
- ISO HDLC and IETF PPP
- Impact of ISDN
- Interoperability challenges
- Benefits and limitations
The Economics of X.25
- Advantages and disadvantages of X.25
- Typical public data network services
- Private vs. public networks
- X.25 tariff variations
- User- vs. server-provided PADs
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Click on course date to make a booking or check availability.
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London |
4 days |
£1995 |
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18 - 21 |
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