ECE 422 Midterm Examination_ ECE422002-Computer Comm Networks

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New Jersey Institute Of Technology *

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422

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Computer Science

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Apr 3, 2024

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ECE 422 Midterm Examination Due Mar 7 at 2:15pm Points 100 Questions 32 Available Mar 7 at 1pm - Mar 7 at 2:20pm 1 hour and 20 minutes Time Limit 75 Minutes Instructions Attempt History Attempt Time Score LATEST Attempt 1 75 minutes 54 out of 100 * * Some questions not yet graded Score for this quiz: 54 out of 100 * * Some questions not yet graded Submitted Mar 7 at 2:17pm This attempt took 75 minutes. Question 1 0 / 4 pts You Answered True All answers have to be in the quiz, even when in some particular cases, you have to perform some calculations on paper (which will be collected for partial credits purposes). Whether you know or not, answer all questions as a blank answer will carry a zero. The transport layer services the application layer (Remember that OSI has seven layers, not 4)
Correct Answer False Question 2 0 / 3 pts Correct Answer True You Answered False Question 3 3 / 3 pts True Correct! False Question 4 3 / 3 pts True Correct! False The twisting of the ethernet cable wires has little to nothing to do with the reduction of EMI (electromagnetic interference) The sequence processed by the transport layer is called a packet ICMP resides in the transport layer
Question 5 3 / 3 pts Protocol Data Unit Frame Packet Correct! Service Data Unit Question 6 0 / 3 pts 1 You Answered 2 Correct Answer 3 4 Question 7 3 / 3 pts Traceroute www.njit.edu Ping www.njit.edu The data passed to the layer below is called a How many frames are exchanged during a request for a document through HTTP The command to acquire the route from a local host to www.njit.edu (http://www.njit.edu) would be
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Correct! Tracert www.njit.edu Traceroute /TTL www.njit.edu Question 8 3 / 3 pts an IPV4 address an IPV6 address Correct! a MAC address a Node address Question 9 3 / 3 pts True Correct! False Question 10 3 / 3 pts an even number rowwise an even number columnwise The sequence 92.68.55.55.55.55 possibly represents Transmission Control Protocol (TCP) enables best-effort transfer of information In the rectangular code, the errors that cannot be detected are the ones that occur in
a number multiple of 4 Correct! an even number rowwise and columnwise simultaneously Question 11 3 / 3 pts 1 2 Correct! 3 4 Question 12 3 / 3 pts Correct! True False Question 13 3 / 3 pts SDU Packet A (15, 11) Hamming code has a Hamming distance equal to The IP address is the same as the logical address The size of the largest PDU transmitted across the data link is called
Frame Correct! MTU Question 14 Not yet graded / 3 pts Your Answer: Correct Answer Question 15 0 / 3 pts Unipolar Correct Answer Polar You Answered Bipolar Manchester encoding Question 16 0 / 3 pts What is the number of possible class B addresses (as a power of 2)? 2 = 16,384 possible addresses 14 For a given transmitter power, the most efficient line code leading to the smallest BER (bit error rate) is How many layers of servers are involved in the DNS protocol?
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1 2 Correct Answer 3 You Answered 4 Question 17 3 / 3 pts True Correct! False Question 18 0 / 3 pts You Answered U EET IT Correct Answer All the above The Time To Live (TTL) is the time between the transmission of a packet and the reception of the acknowledgment frame The decoded Morse code sequence dot dot dash is
Question 19 3 / 3 pts 12 Correct! 15 30 36 Question 20 3 / 3 pts Disk operating System Department of Security Correct! Denial of Service None of the above Question 21 Not yet graded / 3 pts Your Answer: To fully connect 6 users, the number of connections is DoS stands for Given a host with the following IP address, 192.168.22.22/22 What is the mask? (Every answer pertaining to IP addressing questions should be given in decimal ) 255.255.252.0
Question 22 Not yet graded / 3 pts Your Answer: Question 23 Not yet graded / 4 pts Your Answer: Question 24 3 / 3 pts 21 53 80 Correct! 110 Question 25 3 / 3 pts True Given the host from question 21, what is the network address? 192.168.20.0 Given the host from question 21, what is the address of the last host in that network? 192.168.23.254 The port number associated with POP3 is Moore's law shows the exponential evolution of transfer rate of transmission
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Correct! False Question 26 3 / 3 pts TCP ARP Correct! FTP SMTP Question 27 3 / 3 pts Hubs Switches Correct! Routers Null Cables Question 28 0 / 3 pts null cable The protocol used to interchange file on the internet is The smartest devices to connect multiple hosts are If 2 RJ45 cables are connected one end using the T-568A standard and the other one using the T-568B standard, it is a
You Answered crossover cable Correct Answer all of the above none of the above Question 29 0 / 3 pts Correct Answer True You Answered False Question 30 Not yet graded / 5 pts Your Answer: Correct Answer Question 31 0 / 3 pts UDP is an end-to-end protocol Given 3 half words 2E34, 92BA, 7244, find their checksum 0XCCCC HTTP resides in the
network layer Correct Answer transport layer session layer You Answered application layer Question 32 3 / 3 pts 18,000 feet 5500 meters Correct! all of the above none of the above Quiz Score: 54 out of 100 * Some questions not yet graded A T-1 twisted pair cable can provide 1.544 Mbps over a distance of
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