Training for Sales Account Mangers on Networking Basics.

1. Networking Basics
Arjun Vasanthakumar

2. Agenda
• Network Definition
• Types of Network
• Network Terms
• OSI Model
• Network Components
• Enterprise Network Architecture

3. Network Definition

4. What is Network?
• A network, is a collection of computers and devices interconnected to
facilitate communications among users and allows users to share resources.

5. Types of Network

6. Local Area Network
• Connects computers and devices in a limited
geographical area

7. Wide Area Network
• LANs that spans over a broad area (regional,
global)

8. Virtual Private Network
• Connects multiple LANs securely over WAN

9. Network Terms

10. Common Network Terms (1)
• MAC Address - Physical Address of a Device
▫ E.g. “ 08:00:69:02:01:FC ”
• IP Address – Logical Address of a Device
▫ e.g. “ 192.168.1.254 ”
• Protocol – Set of rules that govern a
communication
▫ e.g. TCP, UDP
• Subnet
▫ Block of IP Addresses

11. Common Network Terms (2)
• Fast Ethernet
▫ 10/100 Mbits/sec
• Gigabit Ethernet
▫ 10/100/1000 Mbits/sec
• Power Over Ethernet
▫ Feature that supports a device to pass power along
with data on Ethernet Cabling
• VLAN
▫ a VLAN is a collection of nodes that are virtually
grouped together.

12. Open Systems Interconnection
(OSI model)

13. OSI Model
• Open Systems Interconnection ( OSI ) is a
standard reference model for communication
between two end users in a network. The model
is used in developing products and
understanding networks.

14. OSI model - Layers
Application • Network Process to Application (Email, Internet Explorer)
Presentation • Data Format, Ensure Data is readable (JPEG, GIF)
Session • Establish, Maintain & Disconnect (Host to Host Chat Session)
Transport • End to End Connection, Reliability (TCP, UDP)
Network • Network Address, Best Path (IP, Router)
Data Link • Access to Media (MAC, Switches, Hub)
Physical • Binary Transmission (wires, voltages)

15. Network Components

16. Passive Components
Application • UTP Cable • Patch Panel
Presentation
Session
Transport • SFP Module
• Fibre Cable
Network
Data Link
Physical

17. Network Switch
Application ▫ Devices that links nodes in a LAN
▫ Layer 2 Device
Presentation
▫ Works on MAC Address
Session
Transport
Network
Data Link
Cisco 2960 Switch
Physical

18. Router
Application ▫ Responsible for Routing, Path
selection
Presentation
▫ Layer 3 Device
Session ▫ Works on IP Address
Transport
Network Cisco 1941 Router
Data Link
Linksys Router
Physical

19. Multi-Layer Switch
Application ▫ Device that switches on OSI layer 2 like
an ordinary network switch and provides
Presentation
extra functions on higher OSI layers.
▫ Inter –VLAN Routing
Session
Transport
Network
Data Link
Cisco 3560, Cisco 4500 & Cisco 6500
Physical

20. Wireless Access Point
Application ▫ allows devices to connect to a wired
network with out the need of physical
Presentation
cable
Session
Transport
Network
Data Link Cisco Aironet 1140, 1260, 1500 Series
Physical

21. Firewall
Application ▫ Security Device
▫ Offers protection between
Presentation
Zones
Session ▫ Today's Firewall offers Network
to Application Level Protection
Transport
Network
FortiGate UTM
Data Link
Physical Cisco ASA

22. Enterprise Network
Architecture

23. Enterprise Network
Architecture

24. Access Switch
Connects End Users, IP Phones to
the LAN .
Enterprise Network
Architecture

25. Core Switch
Ties Access switches together. Normally
servers and storage devices are connected
to this.
Enterprise Network
Architecture

26. Access Switch
In Small Offices Access Switch tends to
take the role of Core Switch.
Enterprise Network
Architecture

27. Network Storage
Stores Data of Heterogeneous
Clients (Servers, PC’s)
Enterprise Network
Architecture

28. Router
Allows to terminate WAN Links.
E.g. ADSL, MPLS, Lease Line.
Enterprise Network
Architecture

29. Security Appliance
Secures the Enterprise from
internet attacks
Enterprise Network
Architecture

30. Wireless Access Point
Provides Wireless Network
access to the users.
Enterprise Network
Architecture

31. Unified Communication System
Responsible for providing IP Telephony,
Video Conferencing Services.
Enterprise Network
Architecture

32. Site to Site VPN allows branch Remote Access VPN allows
offices to share and access Remote Users to securely access
corporate resources. corporate resources.
Enterprise Network
Architecture

33. 3 – Tier Architecture

34. 2 – Tier Architecture (Collapsed Core)

35. Thank You