Intro to Data Communications
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Course Introduction
Intro to Data Communications provides a foundational understanding of how data is transmitted between systems in modern networks. The course covers fundamental concepts such as encoding, transmission media, network topologies, and protocols. Students will explore the basics of analog and digital signals, error detection and correction techniques, and the layered approach of network architectures, particularly the OSI and TCP/IP models. By the end of the course, learners will have a clear grasp of how various devices communicate, the challenges involved in reliable data transfer, and the essential standards that ensure interoperability across networks.
Recommended Textbook
Business Data Networks and Security 11th Edition by Raymond R. Panko
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Chapter 1: Core Network Concepts and Terminology
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Q1) If there are 10 routers between the source and destination hosts,how many transport processes will be involved on all devices?
A) 1
B) 2
C) 10
D) 12 Answer: B
Q2) The transport process always fragments the application message.
A)True
B)False Answer: False
Q3) All data link addresses are EUI-48 addresses.
A)True
B)False Answer: False
Q4) The client program is usually a browser.
A)True
B)False Answer: False
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Chapter 2: Network Standards
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Sample Questions
Q1) Which standards agency is especially important for physical transmission processes?
A) ITU-T
B) IETF
C) Both A and B are about equally important.
D) Neither A nor B are important.
Answer: A
Q2) Which of the following is a socket?
A) 80
B) 21
C) both A and B
D) neither A nor B
Answer: D
Q3) Which standards layer governs e-mail?
A) data link
B) transport
C) Internet
D) none of the above
Answer: D
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Chapter 3: Network Management
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Sample Questions
Q1) Which of the following tells you the cumulative round-trip latency to each router along the route to the host?
A) Ping
B) Traceroute
C) both A and B
D) neither A nor B
Answer: B
Q2) Which of the following reduces momentary traffic peaks by controlling how much traffic is allowed into the network?
A) overprovisioning
B) priority
C) QoS guarantees
D) none of the above
Answer: D
Q3) SNMP Set commands can ________.
A) ask agents for information about the managed device
B) change router operation
C) both A and B
D) neither A nor B
Answer: B
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Chapter 4: Network Security
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Sample Questions
Q1) Firewall log files should be read ________.
A) every month
B) every day
C) every week
D) usually only when a serious attack is suspected
Q2) Who are the most dangerous types of employees?
A) financial employees
B) manufacturing employees
C) IT security employees
D) former employees
Q3) Which of the following were able to recoup most of the money they lost from Target?
A) credit card companies
B) retailers
C) both A and B
D) neither A nor B
Q4) Hacking is defined as using a computer resource without authorization or in excess of authorization.
A)True
B)False
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Chapter 5: Ethernet 8023switched Lans
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Sample Questions
Q1) The ability to transmit in two directions simultaneously is ________.
A) parallel communication
B) full-duplex communication
C) both A and B
D) neither A nor B
Q2) If a physical link can use either 4-pair UTP,multimode fiber,or single-mode fiber,which should I use?
A) 4-pair UTP
B) multimode fiber
C) single-mode fiber
D) none of the above
Q3) ________ links connect switches to other switches.
A) Trunk
B) Long
C) Access
D) Workgroup
Q4) In this book,we use the terms Ethernet and 802.3 interchangeably.
A)True
B)False
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Chapter 6: Wireless Lans I
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Q1) A single access point,and the set of hosts it serves,is called a(n)________.
A) BSS
B) BSSID
C) ESS
D) none of the above
Q2) The 60 GHz unlicensed service band offers ________ compared to lower-frequency service bands.
A) more speed per channel
B) greater propagation distance
C) greater ability to penetrate walls
D) all of the above
Q3) What propagation problem is especially bad in moist air?
A) absorptive attenuation
B) electromagnetic interference
C) multipath interference
D) inverse square law attenuation
Q4) Wireless access points typically link wireless clients to ________.
A) wireless servers
B) servers on the wired network
C) both A and B
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Chapter 7: Wireless Lans II
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Sample Questions
Q1) The protection of communication between a wireless client and the access point is
A) link security
B) end-to-end security
C) both A and B
D) neither A nor B
Q2) Employees who set up rogue access points usually have malicious motives.
A)True
B)False
Q3) Bluetooth uses ________ operation.
A) all-to-all
B) point-to-multipoint
C) one-to-all
D) one-to-one
Q4) Communication after authentication is protected most strongly if the ________ initial authentication is used.
A) PSK
B) 802.1X
C) WPA
D) It does not matter which initial authentication mode is used.
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Chapter 8: TCP/IP Internetworking I
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Sample Questions
Q1) TCP/IP standards are set at the ________.
A) physical layer
B) transport layer
C) both A and B
D) neither A nor B
Q2) In the final step,the router sends the packet ________.
A) to a particular device
B) out a particular interface
C) both A and B
D) neither A nor B
Q3) If I simplify the address 2001:0ed2:056b:00d3:00c0:abcd:0bcd:0fe0,I get ________.
A) 2001:ed2:56b:d3:c0:abcd:bcd:0fe0
B) 2001:ed2:56b:d3:c:abcd:bcd:0fe
C) either A or B
D) neither A nor B
Q4) For 100,000 addresses,which will have fewer rows?
A) a routing table
B) an Ethernet switching table
C) Both will be about the same number of rows.
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Chapter 9: TCP/IP Internetworking II
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Sample Questions
Q1) Which of the following is more widely used?
A) ESP
B) AH
C) Both are about equally widely used.
Q2) Corporations wish to have ________ domain names.
A) top-level
B) second-level
C) third-level
D) none of the above
Q3) Which is less expensive to implement?
A) SSL/TLS
B) IPsec
C) Both cost about the same to implement.
Q4) In transport mode,ESP fields surround an IPv4 packet's ________.
A) entire length
B) header
C) data field
D) none of the above
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Chapter 10: Carrier Wide Area Networks Wans
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Q1) Which spends less processing time on each packet arriving at a router?
A) traditional routing
B) MPLS
C) Both spend about equal time.
Q2) A customer's leased line to its ISP connects to the ISP's ________.
A) POP
B) terminal point
C) CSU/DSU
D) interface
Q3) Why is Carrier Ethernet popular?
A) uses a familiar technology
B) offers predictable pricing over multi-year periods
C) both A and B
D) neither A nor B
Q4) What transmission medium do ALL DSL services use?
A) one-pair data-grade UTP
B) two-pair data-grade UTP
C) one-pair voice-grade UTP
D) none of the above
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Chapter 11: Networked Applications
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Sample Questions
Q1) When a message arrives at a Tor router,the router ________.
A) decrypts the arriving message
B) erases its memory of the source address
C) both A and B
D) neither A nor B
Q2) The SIP invite is transmitted to the ________.
A) called party's SIP proxy server
B) called party's VoIP phone or computer
C) both A and B
D) neither A nor B
Q3) Why is link-by-link encryption for confidentiality not fully secure even if there is encryption for confidentiality in all links along the way?
A) There cannot be confidentiality on each link.
B) Devices along the way may not be secure.
C) both A and B
D) neither A nor B
Q4) In VoIP traffic,the data field in a signaling packet usually carries codec data.
A)True
B)False
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Chapter 12: Appendix: Managing the Security Process
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Q1) It is hardest to create good security ________.
A) policies
B) procedures
C) processes
D) culture
Q2) If someone has been properly authenticated,they should receive ________ permissions.
A) all
B) no
C) maximum
D) minimum
Q3) Live rehearsals are important because they ________ compared to desktop rehearsals.
A) are relatively inexpensive
B) get into specific details
C) both A and B
D) neither A nor B
Q4) The goal of security is to eliminate risk.
A)True
B)False
Page 14
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