.Its cheap to install software which can be done on the server alone instead of all computers on the network. Disadvantages of client-server network .Its expensive to setup. .Extra expenses on buying a server computer .Extra expenses on hiring a network administrator .The server is one point of failure. In case the server fails to work, the whole network comes to a standstill. TYPES OF NETWORK SERVERS .File server: One that stores various files and making them available to network users .Application servers: stores application software packages run directly on it and made for users on the network. .Printer server: a central computer that manages a networked printer from a single location. .Web server: It allows users to access outside networks, also providing web content/web pages to users. TYPES OF NETWORK SERVERS .Mail server: Manages mail by receiving, moving and storing mail on the network. .Proxy server: A computer placed between a LAN and an external server or networks (Internet), to filter requests and restrict access to data. A proxy server receives a request for an Internet service from a user. If the request passes filtering requirements, looks in its local cache of previously downloaded Web pages. If it finds the page, it returns it to the user without needing to forward the request to the Internet. If the page is not in the cache, the proxy server, acting as a client on behalf of the user, uses its own IP addresses to request the page from the server out on the Internet. When the page is returned, the proxy server forwards it on to the user. Network topology .Topology is the physical and logical arrangement of a local area network. Hence physical topology and logical topology. .The physical topology of a network refers to the physical arrangement of cables, computers, and other peripheral devices in relation to each other on a network. .logical topology is the method used to pass information between workstations on a network. Types of physical Network topologies .Bus network topology .Ring network topology .Star network topology .hierarchical network topology
.Its cheap to install software which can be done on the server alone instead of all computers on the network. Disadvantages of client-server network .Its expensive to setup. .Extra expenses on buying a server computer .Extra expenses on hiring a network administrator .The server is one point of failure. In case the server fails to work, the whole network comes to a standstill. TYPES OF NETWORK SERVERS .File server: One that stores various files and making them available to network users .Application servers: stores application software packages run directly on it and made for users on the network. .Printer server: a central computer that manages a networked printer from a single location. .Web server: It allows users to access outside networks, also providing web content/web pages to users. TYPES OF NETWORK SERVERS .Mail server: Manages mail by receiving, moving and storing mail on the network. .Proxy server: A computer placed between a LAN and an external server or networks (Internet), to filter requests and restrict access to data. A proxy server receives a request for an Internet service from a user. If the request passes filtering requirements, looks in its local cache of previously downloaded Web pages. If it finds the page, it returns it to the user without needing to forward the request to the Internet. If the page is not in the cache, the proxy server, acting as a client on behalf of the user, uses its own IP addresses to request the page from the server out on the Internet. When the page is returned, the proxy server forwards it on to the user. Network topology .Topology is the physical and logical arrangement of a local area network. Hence physical topology and logical topology. .The physical topology of a network refers to the physical arrangement of cables, computers, and other peripheral devices in relation to each other on a network. .logical topology is the method used to pass information between workstations on a network. Types of physical Network topologies .Bus network topology .Ring network topology .Star network topology .hierarchical network topology