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Network Security focuses on the principles, methodologies, and technologies used to protect computer networks from unauthorized access, misuse, and cyber threats. The course covers topics such as cryptography, authentication, firewalls, intrusion detection and prevention systems, virtual private networks (VPNs), and secure protocols. Students will learn how to identify vulnerabilities, implement security measures, and respond to potential attacks while gaining hands-on experience with tools and best practices for safeguarding network infrastructure in various organizational contexts.
Recommended Textbook
Network Guide to Networks 6th Edition by Tamara Dean
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15 Chapters
627 Verified Questions
627 Flashcards
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41 Verified Questions
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Sample Questions
Q1) Describe considerations to take into account when evaluating if a professional organization is appropriate for an individual.
Answer: Among other things, you will want to consider the organization's number of members, membership benefits, membership dues, technical emphasis, and whether it hosts a local chapter. Many organizations host student chapters on university campuses. You may also want to find a professional association that caters to your demographic group (such as Women in Technology International, if you are female).
Q2) Which type of service supports e-mail?
A) management
B) communications
C) access
D) file
Answer: B
Q3) A ____ network connects clients and servers from multiple buildings.
A) NAN
B) MAN
C) WAN
D) TAN
Answer: B
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Q1) Compare Ethernet and Token Ring frames in terms of their operation on a network. Answer: Ethernet frames are different from token ring frames, and the two will not interact with each other on a network. In fact, most LANs do not support more than one frame type, because devices cannot support more than one frame type per physical interface, or NIC. (NICs can, however, support multiple protocols.) Although you can conceivably transmit both token ring and Ethernet frames on a network, Ethernet interfaces cannot interpret token ring frames, and vice versa. Normally, LANs use either Ethernet or token ring, and almost all contemporary LANs use Ethernet.
Q2) For greater network efficiency, segmentation is preferred.
A)True
B)False
Answer: False
Q3) Which type of protocol is useful when data must be transferred quickly?
A) connection-oriented
B) connectionless
C) TCP
D) IP
Answer: B
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Sample Questions
Q1) ____ describes a popular serial data transmission method.
A) EIA/TIA Commercial Building Wiring Standard
B) EIA/TIA RS-232 (Recommended Standard 232)
C) EIA/TIA 568A standard
D) EIA/TIA 568BA standard
Answer: B
Q2) Explain the makeup of coaxial cable.
Answer: Coaxial cable consists of a central metal core (often copper) surrounded by an insulator, a braided metal shielding, called braiding or shield, and an outer cover, called the sheath or jacket. The core may be constructed of one solid metal wire or several thin strands of metal wire. The core carries the electromagnetic signal, and the braided metal shielding acts as both a shield against noise and a ground for the signal. The insulator layer usually consists of a plastic material such as PVC (polyvinyl chloride) or Teflon. It protects the core from the metal shielding, because if the two made contact, the wire would short-circuit. The sheath, which protects the cable from physical damage, may be PVC or a more expensive, fire-resistant plastic.
Q3) ____________________ transmission involves one transmitter and multiple receivers.
Answer: Point-to-multipoint
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Q1) ____ operates at the Network layer and manages multicasting.
A) IGMP
B) ICMP
C) UDP
D) IP
Q2) In IPv4 addressing, a node with an IP address of 168.34.88.29 belongs to a Class ____ network.
A) A
B) B
C) C
D) D
Q3) A(n) ____ number is the address on a host where an application makes itself available to incoming or outgoing data.
A) port
B) source
C) destination
D) application
Q4) Define and describe Zeroconf (Zero Configuration).
Q5) Define and describe DDNS (Dynamic DNS).
Q6) Describe the DHCP leasing process.
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Q1) In a ring network, each workstation acts as a(n) ____ for the transmission.
A) repeater
B) amplifier
C) terminator
D) manager
Q2) The most common 1-Gigabit Ethernet standard in use today is ____.
A) 1000Base-T
B) 1000Base-SX
C) 10GBase-SR
D) 1000Base-LX
Q3) On an Ethernet network, a(n) ____ is the portion of a network in which collisions occur if two nodes transmit data at the same time.
A) collision domain
B) crash domain
C) interference domain
D) duplicate domain
Q4) ____________________ is a component of a network's logical topology that determines how connections are created between nodes.
Q5) Explain why it is important to understand logical topologies.
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Q1) In general, a steady or blinking green LED, sometimes labeled ____, indicates that the NIC is functional and has a connection to the network.
A) LNK
B) ACT
C) TX
D) RX
Q2) A ____ is a repeater with more than one output port.
A) bridge
B) switch
C) hub
D) router
Q3) Explain why network engineers value VLANs. Include a discussion on reasons for using VLANs.
Q4) Explain hybrid routing protocols. Describe an example.
Q5) A(n) ____________________ is software that enables an attached device to communicate with the computer's operating system.
Q6) Describe how a bridge translates between two segment types.
Q7) Describe a distance-vector routing protocol suited to WANs.
Q8) Describe the IS-IS routing protocol.
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Q1) Describe an important difference between frame relay and X.25.
Q2) The speed of a T-carrier depends on its ____ level.
A) signal
B) hierarchy
C) channel
D) traffic
Q3) SONET specifies framing and multiplexing techniques at the Physical layer.
A)True
B)False
Q4) After SONET, BPL has the best maximum throughput available.
A)True
B)False
Q5) ____ is an updated, digital version of X.25 that also relies on packet switching.
A) DSL
B) ISDN
C) Frame relay
D) ATM
Q6) Explain how ATM relies on virtual circuits.
Q7) Explain how a cable modem is utilized in broadband cable connections.
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Q1) ____ is a command-line function for viewing and setting wireless interface parameters and it is common to nearly all versions of Linux and UNIX.
A) ipconfig
B) iwconfig
C) config
D) ivconfig
Q2) Define and explain the MIMO innovation in the 802.11n standard. Include a description of the advantages it provides.
Q3) The use of multiple frequencies to transmit a signal is known as ____________________ technology.
Q4) WiMAX is defined by the IEEE 802.11 standard.
A)True
B)False
Q5) A directional antenna issues wireless signals along a(n) ____ direction.
A) open
B) narrow
C) wide
D) single
Q6) Discuss what must be taken into account when placing an access point on a WLAN.
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Q1) The ____ gateway is the gateway that first interprets its outbound requests to other subnets, and then interprets its inbound requests from other subnets.
A) proxy
B) core
C) Internet
D) default
Q2) IMAP (Internet Message Access Protocol) is a mail retrieval protocol that was developed as a more sophisticated alternative to ____.
A) POP3
B) POP
C) SMTP
D) MIME
Q3) The gateways that make up the Internet backbone are called ____ gateways.
A) proxy
B) core
C) Internet
D) default
Q4) ____________________ separates a network into multiple logically defined segments, or subnets.
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Q1) Describe the L2TP technology.
Q2) In the case of dial-up networking, the term ____ refers to a modem.
A) serial connection
B) virtual connection
C) physical connection
D) POTS connection
Q3) ____________________ refers to the flexible provision of data storage, applications, or services to multiple clients over a network.
Q4) When a server compares a user's credentials with those in its database, the process is known as ____.
A) authorization
B) authentication
C) administration
D) accounting
Q5) Upon creation, each vNIC is automatically assigned a ____.
A) MAC address
B) switch address
C) block address
D) reference address
Q6) Where do virtual switches or bridges and their configuration reside?
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Q1) In ____, a hacker forges name server records to falsify his host's identity.
A) IP spoofing
B) DNS spoofing
C) ID spoofing
D) DHCP spoofing
Q2) ____ is a public key encryption system that can verify the authenticity of an e-mail sender and encrypt e-mail data in transmission.
A) PGP
B) SSH
C) IPSec
D) SSL
Q3) A ____ main function is to examine packets and determine where to direct them based on their Network layer addressing information.
A) switch's
B) gateway's
C) router's
D) proxy server's
Q4) Describe the two phases IPSec use to accomplish authentication.
Q5) Describe an advantage of using EAP.
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Q1) ____ is preferred over TCP for real-time applications such as telephone conversations and videoconferencing.
A) RTP
B) UDP
C) RTCP
D) SIP
Q2) An off-the-shelf workstation can be programmed to act like an IP telephone.
A)True
B)False
Q3) Explain the issue that IP telephones face regarding the need for electric current .
Q4) ____________________ is a QoS technique that replaces the IP datagram header with a label at the first router a data stream encounters.
Q5) When VoIP relies on the Internet, it is often called ____.
A) telephony
B) Internet telephony
C) IP telephony
D) voice telephony
Q6) Describe six functions performed by signaling protocols.
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Q1) ____ is one of the most important aspects to consider when looking at how a problem solution might affect users and network functionality.
A) Cost
B) Scope
C) Scalability
D) Security
Q2) Most wireless testing tools contain more powerful antennas than a workstation NIC.
A)True
B)False
Q3) Resistance is measured in ____.
A) ohms
B) hertz
C) centimeters
D) volts
Q4) Describe five functions all network monitoring tools perform.
Q5) Describe four ways a network professional might use a multimeter.
Q6) Describe how a problem's solution might affect users and network functionality in terms of security.
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Q1) Generators provide surge protection.
A)True
B)False
Q2) ____ is an automatic distribution of traffic over multiple links or processors is used to optimize response.
A) Redundancy
B) Failover
C) RAID
D) Load balancing
Q3) A(n) ____ is a deviation from a specified level of system performance for a given period of time.
A) fault
B) failure
C) error
D) hoax
Q4) Define mirroring and server mirroring. Describe the necessary requirement for server mirroring.
Q5) An anti-malware policy is meant to protect the network from damage and downtime.
A)True
B)False
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Q1) For a cabling upgrade, the best way to ensure that future upgrades go smoothly is to carefully document the existing cable after making any upgrades.
A)True
B)False
Q2) A(n) ____ is a graphical representation of a network's devices and connections.
A) Multi Router Traffic Grapher
B) network diagram
C) wiring schematic
D) event viewer
Q3) A networked ____ is perhaps the simplest device to add.
A) workstation
B) hub
C) printer
D) server
Q4) A ____ is a correction, improvement, or enhancement to a software application.
A) revision
B) change
C) patch
D) software upgrade
Q5) Explain how asset management simplifies maintaining and upgrading the network.
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