All categories

3 years ago

. Is it conceivable to design a secure operating system for these computer systems? Give arguments for and against.

Computers and Technology

1 answer:

Lena [83]3 years ago

8 0

Answer:

A favor: porque permite manejar la memoria, disco, medios de almacenamiento de información y los diferentes periféricos o recursos de nuestra computadora, como son el teclado, el mouse, la impresora, la placa de red, entre otros.

En contra:

Si uno llega a fallar con un codigo en algun sistema puede verse afectado el dispositivo

Explanation:

You might be interested in

Match the characteristics to the mobile operating system that it describes.

uranmaximum [27]

I think it’s Apple ios
It’s definitely not Microsoft but my guess is Apple

3 0

3 years ago

Why I/O modules is needed between system bus and I/O devices?

beks73 [17]

Answer:

1. Processor communication -- this involves the following tasks:

a. exchange of data between processor and I/O module

b. command decoding - I/O module accepts commands sent from the processor. E.g., the I/O module for a disk drive may accept the following commands from the processor: READ SECTOR, WRITE SECTOR, SEEK track, etc.

c. status reporting – The device must be able to report its status to the processor, e.g., disk drive busy, ready etc. Status reporting may also involve reporting various errors.

d. Address recognition – Each I/O device has a unique address and the I/O module must recognize this address.

2. Device communication – The I/O module must be able to perform device communication such as status reporting.

3. Control & timing – The I/O module must be able to co-ordinate the flow of data between the internal resources (such as processor, memory) and external devices.

4. Data buffering – This is necessary as there is a speed mismatch between speed of data transfer between processor and memory and external devices. Data coming from the main memory are sent to an I/O module in a rapid burst. The data is buffered in the I/O module and then sent to the peripheral device at its rate.

5. Error detection – The I/O module must also be able to detect errors and report them to the processor. These errors may be mechanical errors (such as paper jam in a printer), or changes in the bit pattern of transmitted data. A common way of detecting such errors is by using parity bits.

5 0

3 years ago

) how many bits are used for host number on the child network (subnet) , b) how many usable addresses can exist on this child ne

vovikov84 [41]

Answer:

Machine’s IP=126.127.85.170, Machine’s Netmask=/27, Parent’s Netmask=255.255.240.0 .

a) Machine's Netmask = /27 : therefore no. of remaining bits for hosts =32-27 = 5 bits.

b) No. of usable addresses in the child network = 25 -2 = 32-2 =30 [Since first(network ID of the machine) and last ip (broadcast address of the machine ) addresses are not used ]

c) first usable address is on this child network (subnet) =

First, find out the network id of machine can be found out by doing bitwise AND machine's IP and Machine's subnet mask :

01111110. 01111111.01010101.10101010 (IP)

11111111. 11111111 .11111111 .11100000 (Subnet Mask)

01111110. 01111111. 01010101.10100000 (Network ID )

first usable address is on this child network (subnet) : 01111110. 01111111. 01010101.10100001

: 126.127.85.161

d) what the last usable address is on this child network (subnet) : 01111110. 01111111. 01010101.10111110

: 126.127.85.190

e) what the child network’s (subnet's) broadcast address is :

In the directed broadcast address , all the host bits are 1. Therefore, broadcast address :

01111110. 01111111. 01010101.10111111 (126.127.85.191)

f) what the child network's (subnet's) network number is : Network ID has already been calcuulated in part c .

01111110. 01111111. 01010101.10100000 (126.127.85.160)

6 0

3 years ago

What is the value of 8n when n= = 2?

lidiya [134]

Answer:

The value of 8n would be 16

8(2)= 16

(uhh this is a math question right? Sorry if it has to deal with tech)

6 0

3 years ago

What single awk command can be used to display all the login names and their associated numerical user IDs

Luden [163]

Answer:

Used the command syntax; awk -F":" '{ print "username: " $<number location> "\t\tuid:" $<number location> }' <target folder>

Explanation:

Linux operating system is a fast open-source computer platform for programmers and network administrators. Its system is arranged in a hierarchical tree structure with the root represented as "/" (for absolute path).

The passwd is a folder in the Linux OS that holds the login details of all users in the system network. The 'awk' is one of the commands used to get information from a file in a folder. It prints out the result by specifying the location of the values (like the username and user id) as a variable (with prefix '$') and then the target folder.

8 0

3 years ago