Network Security
Exam Answer Key
Course Introduction
Network Security is an essential course that explores the principles, technologies, and practices used to protect computer networks and data from unauthorized access, attacks, and vulnerabilities. The course covers fundamental concepts such as cryptography, firewalls, intrusion detection and prevention systems, network protocols, and security policies. Students will examine threats like malware, social engineering, and denial-of-service attacks, as well as the mechanisms for securing wireless and wired networks. Practical labs and real-world scenarios are used to develop skills in risk assessment, incident response, and implementing security measures, preparing students to address evolving cybersecurity challenges in modern networked environments.
Recommended Textbook
Business Data Networks and Security 10th Edition by Raymond R. Panko
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Chapter 1: Welcome to the Cloud
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Sample Questions
Q1) At what layer would you find EUI-48 addresses?
A)1
B)2
C)3
D)4
Answer: B
Q2) A ________ may have multiple ________.
A)physical server, virtual machines
B)virtual machine, physical servers
C)both A and B
D)neither A nor B
Answer: A
Q3) If a frame passes through eight switches between the source and destination hosts on a single network,how many data links will there be?
A)1
B)2
C)8
D)9
Answer: A
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Chapter 2: Network Standards
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Sample Questions
Q1) The meaning of a message is referred to as the message's ________.
A)protocol
B)order
C)syntax
D)semantics
Answer: D
Q2) After the Internet layer process does encapsulation,it passes the IP packet to the ________ layer process.
A)transport
B)data link
C)physical
D)none of the above
Answer: B
Q3) In an HTTP,which one (browser or Webserver application program)transmits message first?
A)browser
B)Webserver application program
C)They transmit simultaneously.
D)It depends on the situation.
Answer: A
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Chapter 3: Network Security
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Sample Questions
Q1) Pieces of code that are executed after the virus or worm has spread are called
A)vulnerabilities
B)exploits
C)compromises
D)payloads
Answer: D
Q2) ________ is the general name for proofs of identity in authentication.
A)Credentials
B)Authorizations
C)Certificates
D)Signatures
Answer: A
Q3) Which of the following meets the definition of hacking ________.
A)to intentionally use a computer resource without authorization
B)to use a computer on which you have an account for unauthorized purposes
C)both A and B
D)neither A nor B
Answer: A
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Chapter 4: Network and Security Management
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Sample Questions
Q1) When a firewall policy server is used to manage SPI firewalls,what device creates specific ACL rules?
A)the policy server
B)the SNMP manager
C)individual firewalls
D)none of the above
Q2) Priority is assigning high priority to ________ applications while giving low priority to ________ applications.
A)latency-tolerant, latency-intolerant
B)latency-intolerant, latency-tolerant
Q3) Overprovisioning means ________.
A)assigning high priority to latency-intolerant applications while giving low priority to latency-tolerant applications
B)adding much more switching and transmission line capacity than will be needed most of the time
Q4) Policies are separated by implementation to take advantage of ________.
A)implementer knowledge
B)the delegation of work principle
C)minimum permissions
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Chapter 5: Ethernet 8023switched Lans
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Sample Questions
Q1) The official name for Ethernet addresses is the ________ addresses.
A)MAC
B)EUI-48
C)both A and B
D)neither A nor B
Q2) Ethernet usually has a 100 meter distance limit for ________.
A)physical links
B)data links
C)routes
D)both A and B
Q3) An Ethernet switch knows ________.
A)an IP address for each EUI-48 address
B)a single port number for each EUI-48 address
C)multiple port numbers for each EUI-48 address
D)the entire path from the source host to the destination host
Q4) Managed Ethernet switches ________.
A)are not standardized
B)are managed by an outsourcing company
C)reduce hardware costs
D)reduce labor costs
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Chapter 6: Wireless Lans I
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Sample Questions
Q1) 2.4 GHz and 5 GHz are ________.
A)frequency spectrums
B)broadbands
C)channels
D)service bands
Q2) In CSMA/CD+ACK,when a wireless NIC wishes to transmit,it listens for traffic.If there is traffic,it waits.When the traffic stops,it may transmit immediately.
A)always true
B)sometimes true
C)always false
Q3) Wireless radio transmission speed is usually measured in terms of ________.
A)wavelength
B)frequency
C)amplitude
D)wetness
Q4) Mesh networking in 802.11 is likely to use ________.
A)only wireless devices
B)wireless devices and the site's wired LAN
C)both A and B
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Chapter 7: Wireless Lans 2
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Sample Questions
Q1) Wireless LAN standards come from ________.
A)OSI
B)TCP/IP
C)both A and B
D)neither A nor B
Q2) Breaking into WLANs from outside the premises is ________.
A)drive-by hacking
B)war driving
Q3) Which of the following was created for PANs?
A)802.11
B)Bluetooth
C)both A and B
D)neither A nor B
Q4) In NFC,an attacker several meters away cannot read the transaction.
A)True
B)False
Q5) A notebook computer configured to act like a real access point is a(n)________.
A)evil twin access point
B)rogue access point
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Chapter 8: Tcp-Ip Internet Working I
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Sample Questions
Q1) Row 2707 has the mask /16 and the reliability metric 20.Row 4400 has the mask /16 and the reliability metric 10.Which row will the router choose if both are matches?
A)2707
B)4400
C)either A or B
D)The router will choose the default row.
Q2) There is a row for each individual Ethernet address in a(n)________.
A)Router table
B)Ethernet switching table
C)both A and B
D)neither A nor B
Q3) The version number field in IPv6 has the value ________.
A)0001
B)0100
C)0101
D)0110
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Chapter 9: Tcp-Ip Internet Working 2
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Sample Questions
Q1) To see if a target host can be reached,you normally would send it an ICMP ________ message.
A)echo request
B)error advisement
C)either A or B
D)neither A nor B
Q2) You have a 20-bit network part and a 4-bit subnet part.How many hosts can you have per subnet?
A)14
B)16
C)254
D)none of the above
Q3) In SNMP,companies are often reluctant to use ________ commands because of security dangers.
A)Get
B)Set
C)trap
D)request
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Chapter 10: Carrier Wide Area Networks Wans
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Sample Questions
Q1) Which of the following is a common use for carrier WANs?
A)to connect corporate sites
B)to connect a corporate site to the Internet
C)both A and B
D)neither A nor B
Q2) The highest layer in SDN consists of ________.
A)switches
B)routers
C)the SDN controller
D)SDN applications
Q3) Why is Carrier Ethernet popular?
A)It uses a familiar technology.
B)It has attractive prices.
C)both A and B
D)neither A nor B
Q4) The creation of routing tables for a router is an example of ________.
A)forwarding
B)control
C)both A and B
D)neither A nor B
Page 12
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Chapter 11: Networked Applications
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Sample Questions
Q1) The attack on GHOSTNET began with ________.
A)a wireless vulnerability
B)a social engineering attack
C)malicious mobile code
D)an insider attack
Q2) Which element of the Skype network is in charge of signaling?
A)the login server
B)host nodes
C)super nodes
D)media gateways
Q3) Skype offers ________.
A)free calling among Skype customers
B)free calling to and from Public Switched Telephone Network customers
C)both A and B
D)neither A nor B
Q4) In SQL injection attacks,the attacker sends ________.
A)a legitimate SQL query
B)a malformed SQL query
C)user input that is used in an SQL query
D)an SQL query in malware that is delivered to the target computer
Page 13
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Chapter 12: Module a More on Tcp
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Sample Questions
Q1) A TCP segment carries data octets 456 through 980.The following TCP segment is a supervisory segment carrying no data.What value is in the sequence number field of the latter TCP segment?
A)456
B)457
C)980
D)981
Q2) A TCP segment begins with octet 8,658 and ends with octet 12,783.What number does the sending host put in the sequence number field?
A)8,658
B)8,659
C)12,783
D)12,784
Q3) Flow control in TCP depends on the ________ field.
A)acknowledgement number
B)window size
C)both A and B
D)neither A nor B
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Chapter 13: Module B More on Modulation
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Sample Questions
Q1) QPSK sends ________ bit(s)per clock cycle.
A)1
B)2
C)4
D)16
Q2) In QAM,if you have four possible amplitudes,you have ________ possible states.
A)4
B)8
C)16
D)none of the above
Q3) QPSK modulation uses ________ phases.
A)2
B)4
C)8
D)15
Q4) BPSK modulation uses two ________.
A)amplitudes
B)frequencies
C)phases
D)none of the above
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Chapter 14: Module C More on Telecommunications
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Sample Questions
Q1) Incompatibilities between signaling systems in United States and Europe cause serious problems.
A)True
B)False
Q2) Local calls are always billed on a flat rate basis where the customer pays a monthly fee for unlimited local calling.
A)True
B)False
Q3) Which of the following would a mail order company's customers prefer?
A)900 number service
B)800 number service
C)WATS service
D)They would have no preference among these choices.
Q4) With 900 numbers,the ________ pays and pays ________ per minute than direct distance dialing.
A)caller, more
B)caller, less
C)called party, more
D)called party, less
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Chapter 15: Module D Directory Servers
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Sample Questions
Q1) Directory servers organize information in a ________.
A)mesh
B)hierarchy
C)relational database
D)all of the above
Q2) A company may have many AD domains.
A)True
B)False
Q3) Active Directory is Microsoft's directory server product.
A)True
B)False
Q4) A group of Active Directory trees organized in a hierarchy is a forest.
A)True
B)False
Q5) In Active Directory domains,there is complete replication between domain controllers ________.
A)in the same domain
B)in adjacent levels in the domain hierarchy
C)throughout a tree
D)throughout a forest
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