The document outlines a network design for a company with 6 departments located across multiple branches, proposing subnetting and VLAN configurations on switches, OSPF routing between locations, static routing to the ISP, DHCP and NAT services, ACLs, and Frame Relay, DNS, and wireless access point configurations. The network is designed to support the current and expected future IP addressing needs of each department as the company grows.

1. CCNA4 Case Study
Presentation
By:
Ahmed Sulaiman Al Jenibi
Salem Abdulla Al Shamisi
Mohammed Hamad Al Shamisi

2. Introduction
• Company has 6 Departments
• Personnel, Accounts, Engineering, Sales,
Customer Service, and IT Support
• Private class IP 172.20.0.0/16
• Public address of 199.199.199.1

3. Branches and Users
• Personnel department has 4 users
• Accounts department has 5 users
• Engineering department has 30 users
• Customer Service has 50 users
• Sales Department has 50 users
• IT Support department has 5 users
• Expect 100% growth of current IP requirements

4. Scope
• Implement a network which has 6
departments
• Trunk and VLANs to be configured on switches
• OSPF with ID 1 to connect the networks
expect ISP router
• Static router between ISP router and HQ
• CHAP PPP on call department
• Implementing ACLs

5. Subnetting
Subnet Name Needed Size Allocated size Address Mask Useable Hosts Broadcast Address
Sales Dep. 100 128 172.20.0.0 /25 1 - 126 172.20.0.127
Customer 172.20.0.12
100 128 /25 129 - 254 172.20.0.255
Services dep. 8
Engineering
60 64 172.20.1.0 /26 1 - 62 172.20.1.63
dep.
IT Support
10 32 172.20.1.64 /28 65 - 78 172.20.1.79
dep.
Accounts dep. 10 32 172.20.1.80 /28 81 - 94 172.20.1.95
Personnel dep. 8 16 172.20.1.96 /28 97 - 110 172.20.1.111

6. VLAN Table
• The VLANs are in S3, the server switch.

7. Inter-VLAN Table

8. OSPF Configuration on R1

9. DHCP Table on R3

10. NAT Table on R1

11. NAT Translation Test

12. Access List on R2 to Deny HTTP

13. Frame Relay Switch 1 Configurations

14. Frame Relay Switch 2 Configurations

15. DNS Server Configurations

16. Access Point Configurations

17. Design