السلام عليكم , واجب it210 - منتدى طلاب وطالبات الجامعة السعودية الإلكترونية

Bodz · منذ /17-10-2016, 07:12 AM

شباب نحتاج مساعدة فالواجب التسليم يوم 20 ميلادي ...

coc_domzel · منذ /19-10-2016, 01:20 AM

Q1: Define the three types of data flow. (1 mark)

Circuits can be designed to permit data to flow in one direction or in both directions. There are three ways to transmit: simplex, half-duplex, and full duplex. Simplex is one-way transmission, such as that with radios and TVs. Half-duplex communication link is similar to a walkie-talkie; only one computer can transmit at a time. With full-duplex transmission, you can transmit in both directions simultaneously, with no turnaround time.

Q2: What are the two principles of Protocol Layering?(1 mark)
Protocols at several layers of abstraction form the basis of current models for communication between computers. This paper proposes that communication between humans and computers should likewise be regarded as a series of layered protocols, and that interfaces should be designed to take advantage of the natural tendency of humans to process communication in a layered manner, using protocols learned in other interactions.

يلا نحتاج الباقي

Lazy Student · منذ /19-10-2016, 10:17 AM

حط جميع الإسئلة لو سمحت وتجيك الإجابة ان شاء الله

Judy · منذ /19-10-2016, 01:09 PM

هذي الباقي
A sine wave is offset 1/4 cycle with respect to time 0. What is its phase in degrees and radians?
List three properties for Infrared waves.

iNorah · منذ /19-10-2016, 02:18 PM

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كود:

Q3 Answer
Finding the degree by:
1/4 × 360 = 90
The degree of 1/4 cycle is 90

finding the radians by:
90 × 2π/360 rad = 1/2π = 1.57 rad
The radians of 1/4 cycle is 1.57 rad

mohyee · منذ /19-10-2016, 03:32 PM

Q4: List three properties for Infrared waves.

.. آذار .. · منذ /19-10-2016, 03:44 PM

اقتباس:

المشاركة الأصلية كتبت بواسطة mohyee

Q4: List three properties for Infrared waves.

we cannot use infrared waves outside a building because the sun’s rays contain infrared waves that can interfere with the communication

It can be used for short-range communication.

having high frequencies, cannot penetrate walls this prevents interference between one system and another, but this makes infrared signals useless for long-range communication.

frequencies from 300 GHz to 400 THz

cannot penetrate walls.

yahyanayer · منذ /20-10-2016, 07:50 AM

التسليم في 28 اكتوبر وليس اليوم

تركي باربود · منذ /20-10-2016, 10:52 AM

اقتباس:

المشاركة الأصلية كتبت بواسطة yahyanayer

التسليم في 28 اكتوبر وليس اليوم

للاسف عندنا في فرع المدينة اليوم هو التسليم !! بحسب الملف المرفق وكذلك الدكتور حقنا إلي هو منسق المادة

اليوم عندنا 4 واجبات لازم نسلمها