CS 345 Data Communications

Study Guide III

Study Guide due Monday, May 5th

Exam # 3 Monday, May 5th

 

Define and explain the following concepts (again no cut and paste from the Net):

 

Simplex

Network architecture

Half-duplex

Ethernet

Full-duplex

Token bus

RG 8 & 9

Token Ring

10Base2

FDDI / CDDI

10Base5

Baseband

RG 58

Broadband

Asynchronous data-link protocols

IEEE 802 Project

Synchronous data-link protocols

802.3

SYN character

802.5

Byte-oriented protocols

CSMA/CD

Bit-oriented protocols

10BaseT

BISYNC

Switched Ethernet

DDCMP

Fast Ethernet

Bit stuffing

Gigabit Ethernet

Byte stuffing

Token Passing

DLE

 

HDLC

 

Station types

 

Configuration

 

Response mode

 

I-frame

 

S-frame

 

U-frame

 

 

 

Answer the following questions:

 

1.      Compare asynchronous and synchronous data-link protocols. How are they used?

 

2.      Draw a BISYNC frame and describe the role of each field.

 

3.      Draw an Ethernet frame. Name and identify the role of each of the 7 fields.

 

4.      Name the three categories of synchronous data-link protocols.

 

5.      What are the advantages and disadvantages of byte-oriented and bit-oriented protocols?

 

6.      Systems using HDLC can be characterized in what three ways? What three options can each of these categories provide?

 

7.      Draw an HDLC I-frame, U-frame and S-frame. How do they differ?

 

8.      Name the seven layers of the OSI model.

 

9.      In HDLC, what is bit stuffing and why is it used?

 

10.  Compare the data rates and limitations of 4 different types of media used with LANS.

 

11.  Compare and contrast CSMA/CD and Token Passing.

 

12.  List and describe 5 things that cause transmission errors.

 

13.  What are the advanatages of FDDI over a basic Token Ring Network?

 

14.  What is the data capacity of a T-1 line?

 

15.  Which determines the bandwidth required for a transmission, bauds or bits?

 

16.  A carrier wave between two modems can be modulated in what 4 different ways?

 

17.  What is the primary responsibility of guided and unguided media?

 

18.  All networks can be characterized in what 3 ways?

 

19.  Asynchronous data-link protocols are used mostly with what type of device?

 

20.  Why are synchronous data-link protocols better for networks than asynchronous protocols?

 

21.  What is framing? Why is it needed?

 

22.  Draw and label the DATA/COMMAND, TOKEN, and ABORT frames used in Token Ring.

 

23.  Draw and label the two frames found in FDDI.