Question in netwotking hardware?

Question

1. what is the difference between switch and hup in some details.
2. what is meant by backbone.
3. are servers of diffrent kinds, what is the category of each of them if they are of diffrent kinds
4. what is the responsibility of the network or system adminstrator.
thanks for respected answers.

Answer 1

1. Switch automatically assign IP Addresses, HuB requires manual IP Address assignment.
2. The backend structure of a network, including Switch, Servers, CAT5 Internet Cables, Electricity, UPS Backup Power Supply, and applications, etc. The list is endless.
3. Servers are basically bigger and faster machine with a lot of harddrives and faster CPUs with lots of RAM Memories, versus little and slow laptop or desktop.
4. Network Admin manage the IP Addresses, make sure everyone have Internet, Email Access, no IP Address conflicts, Domain Controllers, Active Directory, Exchange Servers, Network Security (Firewalls, VPN, Remote Access), understand all network hardware and acronyms, some also take care of the PBX (telephone systems). System Admin deals with more the hardware portions of a company, connecting machines, monitors, ordering, and anything IT related will goes to him. There is a big grey area between the Network and System Admin that the tasks overlaps each other. Good luck with the Job Interview, or trying to not get fired after the initial probation period!

Answer 2

Switches DONT assign IP address,

Switches connect multiple networking devices by looking at the header of each packet, referring to its MAC table and forwarding the packet out to the correct port that the computer is connected to on the switch, a switch has some intelligence .

Hubs also connect multiple network devices also but they are dumb, they send the data out on all ports except the one it came in on.

A backbone is a high speed data link, eg the connection between the server farm in a corporate network to the root switch such as a 1gbps or 10gbps connection.

Their are many types of servers, a couple are
Webserver - Http traffic
FTP server - ftp traffic
Exchange server - mail server using x400 protocol.
POP server - mail server using pop protocol ( common one used by ISP's).
Domain controller - a LDAP database, eg Active Directory

A network admin maintains the network integrity, they make sure that the interconnectivity of the computers is up and running.

A systems admin maintains the desktops, user accounts, hardware, pretty much the programs and OS on the computers.

Answer 3

The main difference between Switch and Hub is that

1)Switch is used ofr point-to-point delivery of information packets .This is done with the help of address of computers stored in the switch in a network.

so when a data packet comes to the switch it quickly searches its address database and sends it the right computer.

Hub on the other hand does not have any address translation capacity .so when ever an information packet comes to an hub it just broad casts to the entire pcs connected to the hub.

2)Backbone in terms of netwok topology may be defined as the basis of connection in a network like whether the network is connected in STAR,RING or so.

3)Yes servers are of different types.
a)File server-used for transferring files like FTP
b)Mail Server-used for mails-like Microsoft Exchange server
c)Groupwave server-Cannot express :)

4)The Network Administator or Admin has a wide range of activities to do.
a)like he has to monitor the usage of Resources.Giving Internet Access in coporates.
b)Restricting users for installing softwares.
c)Restricting sites which are not ought to be visited in offices.
d)Regular checkup up of the network to make sure that there are no virus or worms in the network.
and many more.
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Answer 4

1. Hub is a layman's term, usually meant concentrator; it is entirely physical device with no programming logic at all, while switch has some, although I do confuse switch with router in the details.
2. a general term referring to the parts of a system not directly interactive to the user of such system, in networking, the wires and servers.
3. different kinds of computer? not so, specialized kinds of computers? yes, file server, web server, email, ... anything intended employed to be in the service of more than one person is a server.
4. keep the network running; not necessary the individual computers, the network is the responsibility unless told otherwise by supervisor.