1) How long does it take for a 9.5 Mbyte file to be uploaded to a file server using a broadband connection at 2.2 Mbit/s? Choose the nearest to the correct value from the options listed below.
A) 4 s
B) 9 s
C) 17 s
D) 18 s
E) 34 s
F) 36 s
3) A signal takes 4.5 µs to travel from node A to node B. Given a speed of propagation of 1.77x 10^8 m/s, what is the distance between the two nodes? Choose the nearest to the correct value from the options listed below.
A) 25 m
B) 40 m
C) 80 m
D) 250 m
E) 400 m
F) 800 m
4)A round trip delay of 46 µs is measured in a 3.6 km link. Given that any repeater used in the link will be of the same type and that each repeater introduces a 3µs delay, calculate how many repeaters, if any, are used in the link. Use a propagation velocity of 1.77x108 m/s.
B) 1 repeater
C) 2 repeaters
D) 3 repeaters
E) 4 repeaters
F) 5 repeaters
5)Which two of the following statements accurately describe slot time?
A) Slot time is measured in microseconds (µs).
B) Slot time is a measure of the time a computer keeps sensing the channel to ensure no collisions have occurred.
C)Slot time is independent of network speed.
D)An increase in maximum segment length will result in a decrease in slot time.
E)Slot time defines a lower limit on frame length if collisions are to be detected.
F)Slot time is dependent on frame length.
6)Complete the following sentence by identifying the missing words from the list below:
_________ is a term used to describe a private network that an organization could extend to its suppliers to facilitate _________ communication.
● A) B2B, internet
● B) extranet B2B
● C) extranet B2C
● D) B2B,B2C
● E) intranet B2B
● F) internet, B2C
7)Which of the following statements about standards and protocols are true?
A)CSMA/CD is a protocol that is used to provide fair access to users on a LAN.
B)All standardizing bodies are government organizations.
C)Network protocols are rules that govern the way data is transmitted on a network.
D)SNMP is a protocol that is used to detect errors in data packets.
E)UDP is a protocol used in the transportation of data packets where flow control and sequencing is critical.
F)RFC's are private documents that record the minutes of all official standards discussions.
8)Which two of the following statements concerning the TCP/IP protocol family are true?
A)In a connectionless service each packet in a session could take a different route.
B)IP guarantees error-free transportation between source and destination application layers.
C)In OSI layered architecture terms, TCP operates in the nework layer.
D)The TCP header includes data to assist in the flow control of packets.
E)UDP and TCP both sit in the layer above IP and are therefore both connectionless protocols.
F)TCP runs on the top of application layer protocols like HTTP and SNMP.
It provides detailed explanations of the various network questions. The solution was rated '5/5' by the student who posted the question originally.
Network Planning, Link Budget, and Hata Model
A Potential client has asked you to predict the number of cells necessary to cover 100 square miles. The area the client wished to cover compromises 5 sq miles Urban, 25 sq miles, Suburban and the remainder rural. For urban areas the client can acquire 30 m towers, for Suburban 60 m and for rural 100 m
Assume feeder lengths = tower heights, and a mobile height of 2m. For the purpose of this exercise, cell with a radius of less than 1 km are acceptable.
Determine the followings:
1) Is the hardware uplink or downlink limited? Why?
2) How many square miles does each cell site in each environment cover? Assume that the cells are all edge excited hexagons.
3) What is the total number of cells necessary to cover the described area?
The area that the client wishes to cover has a population of 350,000 people. For the client's business case, they have assumed 20% penetration. The population density is 30% in the urban, 60% suburban and 10% rural. The traffic for each demographic is uniformly distributed in the sectors (i.e. if the total traffic is 2 erlangs and there are two cells, each cell carriers 1 erlang of traffic)
4) If each subscriber is assumed to use 42 mE, and the client is deploying a GSM system, how many radios will be required per sector in each environment? Assume for a GSM system that the first radio in each site has only 7 timeslots available for traffic, each subsequent radio has 8 timeslots available for traffic. The system uses only full rate transcoders.
5) Using a GSM system in the PCS F Band, create a frequency re-use table that will support at least 9 erlangs of traffic per sector. Again assume that for as GSM system the first radio in each sector has one timeslot used as a control channel and the system supports only full rate transcoders. Remember, each GSM radio requires 200 KHz of spectrum.
b) From Question 5, fill in the grid below to demonstrate your re-use pattern