Reference no: EM13140825
1. A user message is split into 15 frames, each of which has an 80% chance of arriving error-free. If no error control is used by the data link layer, how many times must the message be sent on the average to get the entire message through?
2. A communication channel has a bit rate of 14 kbps and an one-way propagation delay of 10 msec. If the sender sends one frame and waits for an acknowledgment before proceeding, what range of frame sizes gives an efficiency of at least 50%?
3. A 200 km long cable operates at T1 rate. The propagation speed in the cable is 2/3 of speed of light (200,000 km/sec). How many bits can fit in the cable?
4. A group of N stations share a 64 kbps pure ALOHA channel. Each station generates a 1000-bit frame on an average of once every 100 second, even if the previous frame has not yet been sent (i.e. frame is buffered). What is the maximum value of N?
5. 10,000 travel agents are competing for the use of a single slotted ALOHA channel. The average agent sends 36 requests / hour. A slot time is 125 usec. What is the appropriate total channel load?
6. Consider building a 10Gigabit Ethernet running over a 1-km optical cable with no repeaters. The signal speed in the cable is 200,000 km/sec. What is the minimum frame size?
|
Compare and contrast the differences in frequencies
: Lung Cancer In the small country of Tracetonia located in the Caribbean, the population is one million people and ten percent of the countries population are smokers.
|
|
What is the equilibrium concentration of cl2
: If a reaction mixture initially contains 0.159 M SO2Cl2 , what is the equilibrium concentration of Cl2 at 227 C?
|
|
Determining interest deduction
: Al and Amy file a joint return for the 2007 tax year. Their adjusted gross income is $80,000. They had net investment income of $9,000. In 2007, they had the following interest expenses:
|
|
Why do you think home depot is paying out
: Why do you think Home Depot is paying out only about 38 percent to 67 percent of its net income to stockholders in the form of cash dividends?
|
|
Solve general questions for network communications
: General questions for network communications, A user message is split into 15 frames, each of which has an 80% chance of arriving error-free. If no error control is used by the data link layer, how many times must the message be sent on the averag..
|
|
Traditional development differs from the life-span approach
: Describe how the traditional approach to development differs from the life-span approach. 2 what are cephalocaudal and proximodistal patters of development.
|
|
What event is responsible for the pacemaker potential
: What event is responsible for the pacemaker potential in the SA node? A. slow leakage or movement of Na+ ions into the cells B. activation of voltage-gated K+ channels that allow K+ to enter the cell.
|
|
Create the journal entry to record the sale of the building
: Based on the above information create the journal entry to record the sale of the building on Jan 1, 2009.
|
|
Paid-in capital from stock warrants
: The bonds without the warrants would normally sell at 95. On March 1, 2010, the fair market value of Ruiz's common stock was $40 per share and the fair market value of the warrants was $2.00. What amount should Ruiz record on March 1, 2010 as paid..
|