Module CT3004N:Wide Area Networks

Lecture Week 1

Agenda• Module Introduction

Your Module Leader Your Lecturer and tutorsModule aimsModule outcomes after successful completionModule Assessments and Syllabus SummaryRecommended booklist

• Week 1 Lecture CoverageWAN Technologies

WAN IntroductionWAN DevicesWAN Connection Technologies

Module Leaders’ Roles• Every module has two module leaders:

• Creates the main lecture/tutorial notes• Writes coursework and

examinations• Moderates the coursework and

examinations results• Serves as a lecturer for that

module (usually in London)

• Writes localised lecture/tutorial notes• Marks the coursework and

examinations (lecturers/tutors might also be involved in marking)• Serves as a lecturer for that

module

Your Lecturer and Tutor

Mr. Roshan Chaudhary

Bsc (Hons) In Computer Networking and IT Security

GPA 3.9

International Advance Diploma in Network and Cybersecurity

GPA 4.0

International Diploma in Network and Cybersecurity

GPA 4.0

CCNA Certified

Module aimsThe module aims :

• To understand the benefit of scaling IP addresses

• To understand the basic concept of Wide Area Networks (WANs) .

• To differentiate between different WAN.

• To understand and configure Frame Relays in the routers

• To identify PPP operations to encapsulate WAN data on Cisco routers.

• To understand Network documentation, security and trouble shooting.

• To understand common WAN implementation issues.

Module outcomes after successful completion

• Explain the advantages of using private IP addresses, DHCP and NAT.

• Describe the concept of WAN and differentiate between different types of WAN such as Frame

relay, x.25, ATM.

Module outcomes after successful completion…

• Monitor Frame relay operations in the routers.• Design WAN, document, manage and troubleshoot. • Identify PPP operations. • Explain the purpose of Access Control List and its

implementation. • Work effectively in a small team to demonstrate a

performance measurement in WANs and establish a network performance baseline.

Module Assessments• Assessments:

40% Examination 10% Open book test 50% practical [ individual work]

Tutorials are related to the lectures and examinations.

Workshops are related to the Assignment.

Note:- Students should obtain 40% pass on aggregate from examination and coursework.

Module Syllabus Summary• WAN Technologies: WAN Technologies Overview, WAN

Design.• Point to Point Protocol: Serial Point-to-Point Links, PPP

Authentication, Configuring PPP.• Frame Relay: Frame Relay Concepts, Configuring Frame

Relay.• Network Security: Secure Router Network Services, Cisco

SDM, Secure Router management.• Access Control Lists : Creating, applying, editing and

troubleshooting ACLs

Module Syllabus Summary…

• Tele-worker Services: Broadband Services, VPN technologies.

• Scaling IP addresses: Scaling Networks with DHCP and NAT

• Network Trouble shooting methodology and tools: Network performance baseline, Common WAN issues

Recommended Booklist• Accessing the WAN, CCNA Exploration

Companion Guide, Cisco Press; 2Rev Ed edition, ISBN: 1587132052.

• Accessing the WAN, CCNA Exploration Labs and Study Guide (Lab Companion), Cisco Press; 2Rev Ed edition, ISBN: 158713201X .

Wide Area Networks(WAN) WAN: communications networks which operates

beyond the geographical areas of a LANs.

–WANs connect devices that are separated by a long distance geographical area than a LAN.

–WANs use the carriers, such as phone companies, cable companies, and network providers.

–WANs use serial connections of various types to provide access over large geographical areas.

Wide Area Networks(WAN)

WAN Devices…Modem:• Modulates an analog carrier signal to digital. • Demodulates digital signal to analog signal.Example:- Cable modem , ADSL modem, DSL

modem that transmit broadband frequency.CSU/DSU:• channel service unit (CSU) and a data service unit (DSU). •CSU is responsible for the connection to the telecom network•DSU is responsible for handling the interface with the DTE• Often combined into a single piece of equipment.

CSU/DSU• The CSU provides termination for the digital

signal and ensure connection integrity through error correction and line monitoring.

• The DSU converts the T-carier line frames into frames that LAN can interpret and vice-versa.

WAN Devices…

WAN switch :• These devices typically switch traffic.•Operates at the data link layer of the OSI model• Example- Frame Relay , ISDN

WAN Devices…Router :• Provides internetworking and WAN access

interface ports that are used to connect to the service provider network.

WAN Devices…

WAN Connection technologies

Dedicated Connection : Leased Lines

Dedicated Connection : Leased Lines…

Dedicated Connection Activity

Circuit Switched Connection: Analog Dialup

Circuit Switched Connection: ISDN

ISDN• The Integrated Services Digital Network (ISDN)

prescribes two levels of service, – The Basic Rate Interface (BRI), intended for the

homes and small enterprises– The Primary Rate Interface (PRI), for larger

applications.

Circuit Switched Connection Activity

Analog Dialup

Circuit Switched Connection Activity

ISDN

Packet Switched: X.25, Frame Relay, ATM

Packet Switched: X.25, Frame Relay, ATM

Packet Switched: X.25, Frame Relay, ATM

Packet Switched Connection Activity

Internet Connection: Broadband Services

Internet Connection: Broadband Services

Internet Connection: Broadband Services

Internet Connection: VPN Technology

Internet Connection: VPN Technology

Thank You