Chapter 1 Introduction to Networking

Course 1 Overview Comparing logical and physical networks Networking home computers Networking small offices and home offices Networking large offices Networking enterprises Understanding standards organizations 2

Comparing Logical and Physical Networks Group of connected computers and devices Logical Identifies the design (LANs, WANs) Physical Identifies the components (cables, network devices) 3

Networking Home Computers Home computer with access to Internet 4

Networking Home Computers Typical home network using wireless 5

Wireless Wired Access Point (WAP) Routing capabilities Network Address Translation (NAT) Dynamic Host Configuration Protocol (DHCP) Firewall 6

Networking Small Offices and Homes Offices (SOHOs) Access to the Internet Wireless and wired clients Typically includes a server 7

Networking Small Offices and Home Offices SOHO network 8

Understanding Local Area Networks (LANs) Group of connected devices Varying speeds 100 Mbps, 1000 Mbps, 1 Gbps B for bytes and b for bits 9

Comparing Workgroups and Domains Decentralized authentication 10

Comparing Workgroups and Domains Centralized authentication Domain controller holds Active Directory 11

Comparing Workgroups and Domains Workgroups up to 20 users Domains provide Single sign-on (SSO) Simplified management Group Policy Built-in redundancy and fault tolerance 12

Networking Larger Offices Multiple subnets Computers connected with switches Subnets connected with routers 13

Networking Large Offices LAN for a large office 14

Networking Enterprises Enterprise has no formal definition Typically has thousands of users May have dozens of administrators 15

Understanding WANs WAN connecting two LANs 16

Understanding Branch Offices Branch offices connected in an organization 17

Accessing Networks Remotely Dial-up Uses phone lines and modems Virtual Private Network (VPN) Provides access to a private network over a public network (such as the Internet) 18

Accessing Networks Remotely Remote access via dial-up 19

Accessing Networks Remotely Remote access via VPN 20

Understanding Standards Organizations Internet Engineering Task Force World Wide Web Consortium Institute of Electrical and Electronics Engineers International Telecommunication Union 21

Chapter 1 Summary Comparing logical and physical networks Networking home computers Networking small offices and home offices Networking large offices Networking enterprises Understanding standards organizations 22