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In _________, auto-negotiation allows two devices to negotiate the mode or data rate of operation.

SONET uses _______ TDM multiplexing.

A checksum can  _________ errors.

[10 points] Describe the difference between the infrastructure wireless LANs and ad hoc wireless LANs.

[10 points] Bit-stuff the following frame payload: 0001111111001111111010001111111111111000011111

In IEEE 802.11, distributed coordination function (DCF) uses _______ as the access method.

[10 points] What is the hexadecimal equivalent of the following Ethernet address?01111000 00111001 01000111 11011001 10001110 11010000

A ball is thrown horizontally from a cliff at a speed of 10 m/s. Calculate its speed after one second.

You must type your answer into the given box and show all your work. For credit, please follow the instructions below and show all the steps according to the given order.  Step 1. Type the provided values along with their units in the problem, and designate a specific symbol (standard) for each known value and value that you need to determine.  Step 2. Type the general equations that you will use to solve the problem using the variables (no numbers yet). Step 3. Show steps to utilize the provided values and their respective units to calculate the answer for the value you need to determine.   Problem #2:  Calculate the gravitational potential energy of a 70.0 kg hiker with respect to the sea level, when he is on the top of New Hampshire’s Mount Washington which is 1900 m above the sea level.   Step 1:      Step 2:      Step 3: 

You must type your answer into the given box and show all your work. For credit, please follow the instructions below and show all the steps according to the given order.  Step 1. Type the provided values along with their units in the problem, and designate a specific symbol (standard) for each known value and value that you need to determine.  Step 2. Type the general equations that you will use to solve the problem using the variables (no numbers yet). Step 3. Show steps to utilize the provided values and their respective units to calculate the answer for the value you need to determine.   Problem 4: If a 12 Nm torque is required to turn a wheel, and the wheel’s radius is 0.4 meters, what force must be applied to the edge of the wheel which is perpendicular the radius of the wheel?   Step 1:    Step 2:    Step 3: