Answer Posted / shikha dixit

There are various differences between X.25 and Frame Relay.
The most significant are:

1. Call Control

X.25 connection establishment and release (call control)
use in-band signaling within the same virtual channel used
for user data transmission causing additional overhead.
Frame Relay call control uses separate virtual channels
identified by reserved DLCI using the LMI (Local Management
Interface) protocol.

2. Routing vs. Switching

X.25 performs packet switching on OSI layer 3 (network
layer); Frame Relay performs packet switching on OSI layer
2 (data-link). Frame Relay does not use any layer 3
protocol.

3. Flow Control

Frame Relay (FR) doesn't perform flow control between frame
handlers (FR routers). X.25 routers have to acknowledge
each frame; in case of frame errors frames have to be
retransmitted and acknowledged. Frame Relay relies on flow
control performed by higher layer protocols

Define firewalls?

1040

---

What is the Multicast address used in STP ?

3176

---

Define network topology?

1172

---

What is nat?

1127

---

What is 10base-t?

1259

---

What is mac addresses?

1053

---

I have to do a project in transport domain in J2EE.How can i find informations regarding transport domain and why do we use that?

2375

---

List the different network protocols that are supported by windows rras services?

1286

---

Explain one advantage of mesh topology?

1076

---

how do u share printer through FTP(fire transfer protocol)?

2522

---

Define 10base-t?

1228

---

Explain the major disadvantage of a star topology?

963

---

how to check veritas install or not

2226

---

Explain backbone network?

1152

---

What is looping and how switching loops are avoided at L2 level?

2070

---