Give the detailed comparison of 10 Base‐2, 10 Base‐5 and 10 Base-t LAN wiring schemes used for Ethernet technology.
10 Base-2:
10Base2, also called Cheapernet or ThinNet, is a 10-Mbps baseband Ethernet specification using a 50-ohm thin coaxial cable. 10Base2, defined in the IEEE 802.3a specification, has a distance limit of 185 meters per segment. 10Base2 is based on Manchester signal encoding transmitted over a thin coaxial cable. Minimum 0.5 meters (20 inches) between computer connections. Maximum 30 computers per segment. Follows “5-4-3 rule”, maximum overall length is 925 meters.
Uses thin coax that is cheaper and easier to install than thick Ethernet coax. Transceiver electronics built into NIC; NIC connects directly to network medium. Coax cable uses BNC connector.
Coax runs directly to back of each connected computer. T connector attaches directly to NIC
Useful when many computers are located close to each other. May be unreliable - any disconnection disrupts entire network.
10 Base-5:
10Base5, also called ThickNet, is a 10-Mbps baseband Ethernet specification using standard (thick) 50-ohm baseband coaxial cable. 10Base5, which is part of the IEEE 802.3 baseband physical layer specification, has a distance limit of 500 meters per segment. 10Base5 is based on Manchester signal encoding transmitted. 500 meter maximum segment length (1,640 feet). Uses transceivers attached to segment by means of a vampire tap. Minimum 2.5 meters (8 feet) between transceivers. Maximum 100 computers per segment. Follows the “5-4-3 rule” 5 segments, 4 repeaters, 3 populated segments. Maximum overall length is 2500 meters. Maximum distance from segment to computer is 50 meters (drop cable).
Thick Ethernet also requires termination to avoid signal reflectance. In some circumstances, transceivers may be inconvenient; e.g., workstations in a lab. Connection multiplexor connects multiple computers to a single transceiver:
o Each computer's AUI cable connects to connection multiplexor
o One AUI from multiplexor to Ethernet coax
Connection multiplexor completely invisible to attached computers
10 Base-t:
10BaseT, also known as 10Base-T, is a transmission medium specified by IEEE 802.3i that carries information at rates up to 10Mbps in baseband form using unshielded twisted pair (UTP) conductors with low cost Level 3 or better UTP wiring up to 100 meters (328 ft.). 10BaseT uses RJ45 connectors and sometimes 50-pin AMP connectors to a patch panel. Variously called 10Base-T, twisted pair or TP Ethernet. Replaces AUI cable with twisted pair cable. Replaces thick coax with hub
Extension of connection multiplexing concept. Sometimes called ``Ethernet-in-a-box''. Effectively a very short Ethernet with very long AUI cables can be connected into larger Ethernets
Protocol software and Ethernet wiring:
· All wiring technologies use identical Ethernet specification
o Same frame format
o Same CSMA/CD algorithms
· Can mix different technologies in one Ethernet
· NICs can provide all three connection technologies
Protocol software can't differentiate among wiring technologies
Comparison of wiring schemes:
· Separate transceiver allows computer to be powered off or disconnected from network without disrupting other communication
· Transceiver may be located in an inconvenient place
· Finding malfunctioning transceiver can be hard
· Thin coax takes minimum of cable
· Disconnecting one computer (or one loose connection) can disrupt entire network
· Hub wiring centralizes electronics and connections, making management easier
· Bottom line - 10Base-T most popular because of cost
suppose we have int y[10]; To access the 4th element of the array we write_______
y[4];
y[3];
y[2];
none of given
From the following; which one is the range of Random number generator function rand()?
0 – 32768
1 – 32768
0 – 32767
1 – 32767
From following; which one is the correct syntax of an array initialize: Array size is 10 and it is of double data type to value 0?
arr[10] = {0.0};
double arr[10]= 0.0;
double arr[10] = {0.0};
double arr[] = 0.0;
The string in the array is terminated by a _____
zero
nil
null
one
In C/C++; by default arguments are passed by _____ to a function.
Reference
Value
Type
Data
1
char name [] = “Hello World” ; In the above statement, a memory of _______ characters will be allocated
13
11
12
10
_______ Keyword is used to return some value from a function.
break
return
continue
goto
Which of the function call is call by value for the following function prototype? float add(int);
add(&x);
add(x);
add(int x);
add(*x);
The increment of a pointer depends on its_________.
variable
value
data type
None of the given
The ASCHI code of null character is_________
000
010
111
110
Pointers are a special type of __________in which a memory address is stored
Select correct option:
variables
Location
Characters
None of the given
Transpose of a matrix means that when we interchange rows and columns_____________
Select correct option:
the first row becomes the Last column
the first row becomes the first column
the Last row becomes the first column
the first column becomes the first row
Pointers store the ____________________
Select correct option:
value of a variable
memory address
characters
None of the given
Which of the following function call is “call by reference” for the following function prototype? int add (int *);
Select correct option:
add(&x);
add(int x);
add(x);
add(*x);
The name of the array is a constant pointer which contains the memory address of the ____________of the array.
Select correct option:
first element
Last element
second element
None of the given
array name always contains the memory address of the ___________of the array
Select correct option:
entire elements
last element
first element
None of the given
At the___________, we try to break up the problem into functional units
Select correct option:
analysis phase
design phase
Implementation phase
None of the given
y[4];
y[3];
y[2];
none of given
From the following; which one is the range of Random number generator function rand()?
0 – 32768
1 – 32768
0 – 32767
1 – 32767
From following; which one is the correct syntax of an array initialize: Array size is 10 and it is of double data type to value 0?
arr[10] = {0.0};
double arr[10]= 0.0;
double arr[10] = {0.0};
double arr[] = 0.0;
The string in the array is terminated by a _____
zero
nil
null
one
In C/C++; by default arguments are passed by _____ to a function.
Reference
Value
Type
Data
1
char name [] = “Hello World” ; In the above statement, a memory of _______ characters will be allocated
13
11
12
10
_______ Keyword is used to return some value from a function.
break
return
continue
goto
Which of the function call is call by value for the following function prototype? float add(int);
add(&x);
add(x);
add(int x);
add(*x);
The increment of a pointer depends on its_________.
variable
value
data type
None of the given
The ASCHI code of null character is_________
000
010
111
110
Pointers are a special type of __________in which a memory address is stored
Select correct option:
variables
Location
Characters
None of the given
Transpose of a matrix means that when we interchange rows and columns_____________
Select correct option:
the first row becomes the Last column
the first row becomes the first column
the Last row becomes the first column
the first column becomes the first row
Pointers store the ____________________
Select correct option:
value of a variable
memory address
characters
None of the given
Which of the following function call is “call by reference” for the following function prototype? int add (int *);
Select correct option:
add(&x);
add(int x);
add(x);
add(*x);
The name of the array is a constant pointer which contains the memory address of the ____________of the array.
Select correct option:
first element
Last element
second element
None of the given
array name always contains the memory address of the ___________of the array
Select correct option:
entire elements
last element
first element
None of the given
At the___________, we try to break up the problem into functional units
Select correct option:
analysis phase
design phase
Implementation phase
None of the given
