Roles include client, server, email server, DNS server, router and firewall.
Computers can take on many roles in a networked world. 1. A computer could be a client which means that this computer is used to accesses information from a server. 2. A computer could be a server which, stores and shares information to clients over the network 3. A computer could take on the role of routing, which means this computer connects to networks and decides where to send information which is received from one network and then sent to another. 4. A computer could be a DNS server, which is basically a router, but in this case it translates a web address that is written in letters to the ip address of that webpage 5. A computer could take on the role of a firewall, which means this computer is basically a router, but in this case the computer decides on what connections to let through to protect the integrity of the client computer which uses the firewall.
Router Definition A Router is a device that connects two networks - frequently over large distances. It understands one or more network protocols, such as IPor IPX. A Router accepts packets on at least two network interfaces, and forwards packets from one interface to another. Router's may be programmed to filter out some packets, and to dynamically change the route by which packets are routed. Router's often use different media on each interface. For instance, a router might have one Ethernet port and one ISDN port.
DNS Server Definition A DNS server is any computer registered to join the Domain Name System. A DNS server runs special-purpose networking software, features a public IP address, and contains a database of network names and addresses for other Internet hosts.
Hardware Firewall Definition A firewall that is built into a router or a stand-alone device. Although such units may, in fact, be computers with firewall software, they are still considered "hardware" firewalls. They tend to provide greater performance, are easier to administer and may offer greater protection than a software-based firewall in each user's machine.
IB Definition
Roles include client, server, emailserver, DNS server, router and
firewall.
Computers can take on many roles in a networked world.
1. A computer could be a client which means that this computer is used to accesses information from a server.
2. A computer could be a server which, stores and shares information to clients over the network
3. A computer could take on the role of routing, which means this computer connects to networks and decides where to send information which is received from one network and then sent to another.
4. A computer could be a DNS server, which is basically a router, but in this case it translates a web address that is written in letters to the ip address of that webpage
5. A computer could take on the role of a firewall, which means this computer is basically a router, but in this case the computer decides on what connections to let through to protect the integrity of the client computer which uses the firewall.
Router Definition
A Router is a device that connects two networks - frequently over large distances. It understands one or more network protocols, such as IPor IPX. A Router accepts packets on at least two network interfaces, and forwards packets from one interface to another.
Router's may be programmed to filter out some packets, and to dynamically change the route by which packets are routed. Router's often use different media on each interface. For instance, a router might have one Ethernet port and one ISDN port.
http://hitachi-id.com/concepts/router.html
DNS Server Definition
A DNS server is any computer registered to join the Domain Name System. A DNS server runs special-purpose networking software, features a public IP address, and contains a database of network names and addresses for other Internet hosts.
http://compnetworking.about.com/od/dns_domainnamesystem/f/dns_servers.htm
Hardware Firewall Definition
A firewall that is built into a router or a stand-alone device. Although such units may, in fact, be computers with firewall software, they are still considered "hardware" firewalls. They tend to provide greater performance, are easier to administer and may offer greater protection than a software-based firewall in each user's machine.
http://www.pcmag.com/encyclopedia_term/0,1237,t=hardware+firewall&i=57774,00.asp