1 The User Datagram Protocol UDP provides which of the follo

1) The User Datagram Protocol (UDP) provides which of the following \"services\" to the user?

A) Port addressing

B) Duplication Protection

C) Sequence Preservation

D) Guaranteed Delivery

2) Which of the following is not a protocol architecture?

A) OSI

B) TCP/IP

C) SNA

D) All of the above

3) If a TCP/IP packet must first pass through a router on its way to the final destination, the IP address of the router will be found in:

A) The user data

B) The transport header

C) The IP header

D) The network header

4) The OSI Physical Layer specification includes the physical interface between devices, including all of the below except:

A) Functions performed by individuals circuits of the physical interface

B) Physical connector specs

C) Error detection and control

D) Representation of the bits (voltage, rate)

E) Sequence of events in exchange

5) The OSI Data Link layer is concerned with reliability. Higher layers may assume error free transmission, provided systems are directly not connected.

A) True

B) False

6) T/F: Since, in the OSI model, each layer in the middle depends on lower layers for services and provides services to higher layers, a change in either the higher or lower layer wil require changes inside the layer in the middle?

A) True

B) False

7) True/False: TCP PDU is another name for a TCP segment

A) True

B) False

Solution

Please follow the data and description :

1)

UDP :

UDP provides two services not provided by the IP layer. It provides port numbers to help distinguish different user requests and, optionally, a checksum capability to verify that the data arrived intact.

So the answer is OPTION A (Port addressing).

2)

TCP/IP does not correspond to this model directly, as it either combines several OSI layers into a single layer, or does not use certain layers at all.

So the answer is OPTION C (TCP/IP).

3)

An IP header is header information at the beginning of an IP packet which contains information about IP version, source IP address, destination IP address, time-to-live, etc. So the answer is OPTION C (IP Header).

4)

The specification Error detection and control is not included over the physical layer of the OSI reference model. So the answer is OPTION C (Error detection and control).

5)

The Data Link Layer is primarily responsible for communications between adjacent network nodes. Network switches and hubs operate at this layer which may also correct errors generated in the Physical Layer.

So the answer is OPTION A (True).

6)

Yes, Since, in the OSI model, each layer in the middle depends on lower layers for services and provides services to higher layers, a change in either the higher or lower layer wil require changes inside the layer in the middle.

So the answer is OPTION A (True).

7)

The Layer 2 (Data Link Layer) PDU is the frame. The Layer 3 (Network Layer) PDU is the packet. The Layer 4 (Transport Layer) PDU is the segment for TCP or the datagram for UDP.

So the answer is OPTION A (True).

Hope this is helpful.