chuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuu1.pptx
- 1. Ch1: Network & System Administration What is network & system administration? It is about putting together a network of computers, getting them running and then keeping them running in spite of the activities of users who tend to cause the system to fail. It is a system implemented by a person or a group of persons under the supervision of knowledgeable person who is network administrator. It is a process of installing, configuring, troubleshooting and maintaining a network. It is the way to monitor the delivery of information across a network and protect the network from internal and external security threats.
- 2. What is a system? It is a combination or an integration of subsystems which are independent objects, having specific performances to attain the same goal. In the network system, objects that constitute a system are: Users Hardware resources Software resources Network expertise/Network administrator
- 3. Who is system / network administrator? It is a professional person who is responsible for the physical design, management of network & system administration. Network/System administrators are responsible for the security and availability of the network services they manage. Network administrators must adhere to the following universal Information Technology Policies: Network Connection Policy Wireless LAN Policy Network and System Monitoring Policy Network Security Policy Network Access Policy
- 4. What is network design? It describes making various decisions regarding the architecture of a network such as: The LAN and WAN technologies to be used The transmission media to be used The cable layout to create high speed backbones The hardware equipment to be used
- 5. General network administration tasks These tasks are categorized into 3: 1) Managing network accounts which includes: a. Creating user accounts b. Creating group accounts c. Creating computer accounts d. Deleting user and computer accounts e. Renaming user and computer accounts f. Assigning access rights to the users 2) Managing network performance which includes Verifying the proper working of network devices such as network cards, connectivity devices, computers, etc.
- 6. 3) Managing network security which includes: a. Securing data stored on the network from external or unauthorized bodies. b. Retrieving data from storage in the event of data loss. There are two types of network securities: i. Physical security – securing hardware resources such as cables, servers and others from physical damage. ii. Data security – securing network data and software resources.
- 7. The network administrator must include the following points as a check list in his/her network security planning: What should be protected? From whom it should be protected? How likely is the occurrence of the threats or challenges? What is the estimated financial loss due to the threats or challenges?
- 8. The key roles of network & system administrator 1) Documenting the network and its resources: o Any modification made to the network should be documented immediately. o This document should include: Type of computer being used. The name of computer (assigned by network administrator). The IP address of computers. Operating system being used on each computer. The network design or map detailing the location of network resources.
- 9. 2) Administering network IP addresses and sub-netting: o Grouping computers on the basis of department or functional location. o Assigning IP address and subnet masks: this can be done manually using static configuration or dynamically using DHCP server. 3) Educating (Training) network users: o It involves: • The proper use of networking and its resources. • Providing knowledge about virus threats & its solutions.
- 10. 4) Designing a network which is logical and efficient: Deciding what services are needed. Planning and implementing adequate security. Providing a comfortable environment for users. Developing ways of fixing errors and problems which occur.
- 11. Concepts of server based network It is a network architecture in which client requests data from server and the server responds to the request in retrieving the required information. It provides shared resources such as: o Software o Peripherals o Files o Storage devices Advantages of server based networking: i. Sharing centralized resources. ii. Managing network security. iii. Backup purpose. iv. Maximizing number of clients in the network. v. High capacity to store data.
- 12. Concepts of Active Directory & Domain Controller Active Directory (AD): Active directory is a database of computers, users, shared printers, shared folders and other network resources which enables user to find a particular resource and allows administrator to see a hierarchal view of the network. Domain Controller (DC): It is a computer with windows server OS that provides a complete network data base or active directory. It provides the network administrator with a facility to control all objects in the network environment. End of Chapter 1