in the ospf over broadcast n/w the term DR and BDr comes in account
DR-refred is Deginagted router
BDR= backup deginated router
The consept behinad choosing the dr and bdr over broadcast n/w is that insteed of sahrinf each routing update of on the n/w segment it will sahre all information to dr and bdr
dr and bdr is slected by Hello intervell and it is completly based upon router id
What r the difference between windows xp and windows vista
Hi,
switch and hub.
switch is a hardware based device which operates at high speed.
switch has the concept of vlan and hence it has multiple broadcast domain.mac-addr table lookup is CAM.
Hub is a multiport repeater which floods the frame(not broadcast).
its does not have any intelligence.its an half duplex device.
Last edited by devakumaran; 11-15-2009 at 10:24 AM.
a vlan stands for a virtual local area network i.e you may have many vlans in a single network and people in the same vlan can communicate but can't do so to people in a different vlan
DHCP (D)iscover
DHCP (O)ffer
DHCP (R)equest
DHCP (A)ck
Client makes a UDP Broadcast to the server about the DHCP discovery.
2) DHCP offers to the client.
3) In response to the offer Client requests the server.
4)Server responds all the Ip Add/mask/gty/dns/wins info along with the acknowledgement packet.
VLAN=Broadcast domain=subnet
Q,1. Difference b/w router and switch ?
Ans. In simple words router is a machine to travel our data into different network
and switch is a machine which work in lan.
In future technologies the switch will work as layer 3 device.
I hope u got their difference.
Last edited by junisadna; 04-03-2010 at 12:12 PM.
Ftp(file transfer protocol) and Udp(user datagram protocol)
ftp is used to share files,transfer data from server to client and vice versa.
It work on port 21 for control connection to server and data connection on port 20.simply to ftp to share files.
UDP it is a transport layer protocol,connectionless,fast,unreliable,no acknowledge,best effort protocol used where to save processing time.used in real time applications.data is send and recieved in form of datagram or units.
Last edited by junisadna; 04-03-2010 at 12:14 PM.
VLAN (virtual loca area network)
It is simply a logical way of grouping users on the network based on function irrespective of their geographical location.
It helps in enforcing security within a network.
this is venkat rangaraj. i realy glad to know the information about the netwoking side . can u give the total information about the networking . that means how it can be works, and ect.
The Switch ports are grouped to different Vlans, so that end devices connected to those switch ports can limit any broadcast (what they do repeatedly to find out one another's IP addresses)to themselves.
So, they are called Broadcast Domains.
tel me clearly abt router?
very good tips from denarii systemsIf you really into networking and want to keep in deep study VPNS swl server QA and try to get a cisco certification you will be making 60-80ks a year . any question email me.
difference between switch,bridge,hub?
VLAN is Virtual LAN. Used on WAN's, Enterprise Networks etc... Makes trafic between different parts of the network seem like it's on a LAN. Usually used by large organisations to avoid the need to connect through ISP's for interoffice connections.