Data Communications and Networking Study Guide Questions
Course Introduction
This course provides a comprehensive introduction to the fundamental concepts and principles underlying data communications and computer networking. Students will explore the architecture, protocols, and technologies that enable the transmission and exchange of data across distributed systems and the internet. Key topics include network models (OSI and TCP/IP), physical and data link layer technologies, error detection and correction, switching and routing, wireless and wired transmission media, network security, and fundamental network services and applications. Emphasis is placed on both theoretical foundations and practical aspects, equipping students with the knowledge required to understand, design, and troubleshoot networked systems.
Recommended Textbook
Network+ Guide to Networks 8th Edition Jill West
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12 Chapters
600 Verified Questions
600 Flashcards
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Chapter 1: Introduction to Networking
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Sample Questions
Q1) How can you prevent damage to a component prior to touching it?
Answer: Before touching a component, first ground yourself using one of these methods:
*Wear an ESD strap around your wrist that clips onto the chassis or computer case, which eliminates any ESD between you and the chassis and its components.
*If you don't have an ESD strap handy, be sure to at least touch the case before you touch any component inside the case. This is not as effective as wearing an ESD strap, but can reduce the risk of ESD.
*To protect a sensitive component, always store it inside an antistatic bag when it's not in use.?In addition to protecting against ESD, always shut down and unplug a computer before working inside it.
Q2) Static electricity is an electrical charge in motion. A)True
B)False
Answer: False
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3
Chapter 2: Network Infrastructure and Documentation
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Sample Questions
Q1) What does a statement of work document do?
A) It documents in detail the work that must be completed for a particular object, and includes specifics such as tasks, deliverables, standards, payment schedule, and work timeline.
B) It documents the intentions of two or more parties to enter into a binding agreement, or contract, and is sometimes used between an informal handshake and the legally binding signatures on contracts.
C) It is a legally binding contract or part of a contract that defines, in plain language and in measurable terms, the aspects of a service provided to a customer, such as the service provided by an ISP.
D) It is a contract that defines the terms of future contracts between parties, such as payment terms or arbitration arrangements.
Answer: A
Q2) How should a company deal with the documentation of passwords?
Answer: Password documentation must be kept secure, but also must be available for access by multiple people. Otherwise, if the network admin is suddenly incapacitated, you might be unable to retrieve high-security passwords. A password manager, such as KeePass or LastPass, should be utilized to secure passwords.
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Page 4
Chapter 3: Addressing on Networks
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Sample Questions
Q1) Encrypted control of remote computers using the RDP protocol is accomplished using what port number?
A) TCP 22
B) UDP 161
C) TCP 3389
D) UDP 10000
Answer: C
Q2) When using IPv6, two or more nodes on the same link are said to be neighbors.
A)True
B)False
Answer: True
Q3) Which of the following IP addresses would be a loopback IP address?
A) 169.254.0.1
B) 192.168.1.1
C) 224.0.0.1
D) 127.0.0.1
Answer: D
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Chapter 4: Network Protocols and Routing
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Sample Questions
Q1) You have been tasked with the replacement of OSPF with EIGRP throughout your organization, which consists of a mixture of Cisco routers and routers from other vendors. What statement is accurate?
A) EIGRP will increase CPU utilization on core routers.
B) Increased traffic will result from the switch to EIGRP.
C) EIGRP may not be available on non-Cisco routers.
D) Convergence time will be increased with EIGRP.
Q2) What is MAC address spoofing?
Q3) Routing Information Protocol (RIP) is an interior gateway protocol that uses a link-state algorithm.
A)True
B)False
Q4) The IP connectionless protocol relies on what other protocol to guarantee delivery of data?
A) UDP
B) ICMP
C) TCP
D) ARP
Q5) What are some of the basic functions of a network router?
Q6) What are the different categories of routers, and how do they compare?
Page 6
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Chapter 5: Network Cabling
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Sample Questions
Q1) You have been awarded a contract for wiring a new federal building. What twisted-pair wiring standard must you use?
A) TIA/EIA 568A
B) TIA/EIA 568B
C) TIA/EIA 568F
D) TIA/EIA rollover
Q2) A time domain reflectometer sends a signal and analyzes the return signal's change in amplitude to determine where cable imperfections may exist.
A)True
B)False
Q3) What is the fastest Ethernet standard that can possibly be used on twisted-pair cabling?
A) 100Base-T
B) 1000Base-T
C) 10GBase-T
D) 10TBase-T
Q4) What is the biggest limiting factor on fiber-optic cable length?
Q5) When tracing a wire, how do you utilize a toner and probe kit?
Q6) What is the difference between bandwidth and throughput?
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Chapter 6: Wireless Networking
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Sample Questions
Q1) When deciding antenna types, why might the use of an omnidirectional antenna be inadvisable?
Q2) If you need to evaluate Wi-Fi network availability as well as optimize Wi-Fi signal settings and identify security threats, what tool should you use?
A) spectrum analyzer
B) protocol analyzer
C) Wi-Fi analyzer
D) air scanner
Q3) Which 802.11 frame type is related to medium access and data delivery, and includes ACK and RTS/CTS frames?
A) management frames
B) control frames
C) data frames
D) extended frames
Q4) How many data streams are used in 802.11ac Wave 2 devices?
A) 2 data streams
B) 3 data streams
C) 4 data streams
D) 8 data streams
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Chapter 7: Virtualization and Cloud Computing
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Sample Questions
Q1) Digital certificates are issued, maintained, and validated by an organization called a certificate authority (CA).
A)True
B)False
Q2) What open-source VPN protocol utilizes OpenSSL for encryption and has the ability to possibly cross firewalls where IPsec might be blocked?
A) Layer 2 Tunneling Protocol (L2TP)
B) Point-to-Point Tunneling Protocol (PPTP)
C) Generic Routing Encapsulation (GRE)
D) OpenVPN
Q3) What are some of the features that all cloud services usually have in common?
Q4) What cloud service model involves providing applications through an online user interface, providing for compatibility with a multitude of different operating systems and devices?
A) IaaS
B) SaaS
C) XaaS
D) PaaS
Q5) What is the difference between a virtual firewall and a software firewall?
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Chapter 8: Subnets and VLANs
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Q1) Network segmentation at Layer 2 of the OSI model is accomplished using VLANs.
A)True
B)False
Q2) How large is the 802.1Q tag that is added to an Ethernet frame when using VLANs?
A) 4 bytes
B) 8 bytes
C) 12 bytes
D) 20 bytes
Q3) A subnet of 255.255.248.0 can be represented by what CIDR notation?
A) /18
B) /20
C) /21
D) /29
Q4) Network segmentation decreases both performance and security on a network.
A)True
B)False
Q5) What are some of the different reasons to use VLANs?
Q6) Only Class B and Class C networks can be subnetted.
A)True
B)False
Page 10
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Chapter 9: Network Risk Management
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Sample Questions
Q1) The day after Patch Tuesday is informally dubbed Exploit Wednesday.
A)True
B)False
Q2) An attack that relies on redirected and captured secure transmissions as they occur is known as what type of attack?
A) buffer overflow
B) session hijacking attack
C) man-in-the-middle attack
D) banner-grabbing attack
Q3) A person posing as an employee strikes up a conversation with a legitimate employee as they walk into a secured area, in an attempt to gain access. What kind of social engineering is this?
A) phishing
B) baiting
C) quid pro quo
D) tailgating
Q4) Over a long-distance connection, using SSH keys is more secure than using passwords.
A)True
B)False
Page 11
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Chapter 10: Security in Network Design
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Sample Questions
Q1) In ACL statements, using the "any" keyword is equivalent to using a wildcard mask of what value?
A) 0.0.0.0
B) 255.255.255.255
C) 255.255.0.0
D) 0.0.255.255
Q2) Which protocol designed to replace STP operates at Layer 3 of the OSI model?
A) Rapid Spanning Tree Protocol (RSTP)
B) Transparent Interconnection of Lots of Links (TRILL)
C) Shortest Path Bridging (SPB)
D) Multiple Spanning Tree Protocol (MSTP)
Q3) What is the difference between an Intrusion Detection System and an Intrusion Protection System?
Q4) How does the Remote Authentication Dial-In User Service (RADIUS) function?
Q5) If your LAN utilizes a proxy server, and you wish to send an email message from your workstation inside the LAN to a colleague via the Internet, what does this process look like?
Q6) What is multifactor authentication, and what are some examples?
Q7) What is the purpose of Unified Threat Management (UTM)?
Q8) How does the CCMP help ensure data confidentiality?
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Chapter 11: Network Performance and Recovery
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Sample Questions
Q1) The Link Aggregation Control Protocol was initially defined by what IEEE standard?
A) IEEE 802.3af
B) IEEE 802.1cd
C) IEEE 802.3ad
D) IEEE 802.3bd
Q2) A network TAP serves what purpose on a network?
A) It provides a mirrored port for monitoring traffic between other ports.
B) It provides wireless monitoring capabilities, as well as spectrum analysis.
C) It monitors network throughput at a specific point in the network.
D) It serves as a miniature firewall that can be placed in front of any connection.
Q3) Wireshark or any other monitoring software running on a single computer connected to a switch doesn't see all the traffic on a network, but only the traffic the switch sends to it, which includes broadcast traffic and traffic specifically addressed to the computer.
A)True
B)False
Q4) What are the different types of power flaws that can cause damage?
Q5) What is the difference between a fault and a failure in relation to networking?
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Chapter 12: Wide Area Networks
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Sample Questions
Q1) How is ATM able to guarantee a specific QoS for certain types of transmissions?
Q2) In a cellular network, where does each wireless base station connect to?
A) They connect directly to the central office.
B) They connect to a mobile switching center.
C) They connect to other wireless base stations, then to the central office.
D) They connect to a wireless station repeater.
Q3) The Global System for Mobile Communications (GSM) utilizes what technology to create timeslots on a channel?
A) frequency division multiplexing (FDM)
B) wavelength division multiplexing (WDM)
C) dense wavelength division multiplexing (DWDM)
D) time division multiple access (TDMA)
Q4) What type of virtual circuit allows connections to be established when parties need to transmit, then terminated after the transmission is complete?
A) permanent virtual circuit (PVC)
B) switched virtual circuit (SVC)
C) dynamic virtual circuit (DVC)
D) looping virtual circuit (LVC)
Q5) What is the role of a multiplexer when working with T-carrier lines?
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