Module 3 Flashcards
Which of the following are components of a network?
A) network standards
B) hard drives
C) messages
D) protocols
E) communications devices
C) D) E)
As defined in the online lecture the following are components of a network: Applications, Messages, Protocols, Sending (Originating) Devices, Communications channels, Communications Devices, Receiving (Destination) Devices.
What component(s) are necessary for a WLAN?
A) twisted pair cable
B) access card
C) access point
D) router
E) fiber optic media
B) C)
Which of the following are true about a router?
A) A router is necessary to switch frames within a network.
B) A router transfers packets from one network to another network.
C) A router works at the Internet layer of the 5 layer hybrid OSI/TCP/IP model.
D) A router transmits frames between networks.
E) A router translates DNS names to IP addresses.
B) C)
What is the dominant technology used in desktop area networks?
A) RFID
B) infra red
C) Bluetooth
D) DSL
E) Ethernet
C)
What organization is responsible for establishing standards that govern how the Internet operates?
A) Internet Engineering Task Force (IETF)
B) The American National Standards Institute (ANSI)
C) The International Telecommunications Union – Telecommunications Group (ITU-T)
D) Institute of Electrical and Electronic Engineers (IEEE)
E) The International Organization for Standardization (ISO)
A)
The five-layer hybrid OSI/TCP/IP (or Internet) model includes which of the following layers?
A) physical
B) transaction
C) routing
D) application
E) data link
A) D) E)
A protocol data unit (PDU) contains which of the following?
A) MDU
B) trailer
C) digital signature
D) header
E) payload
B) D) E)
What is the highest layer processed by a router?
A) physical
B) transport
C) data link
D) applications
E) internet
E)
Which of the following is the internet layer responsible for?
A) providing communication between two networks
B) the end to end communication between the source and final destination entities
C) representing bits (1 and 0) on the media
D) routing packets
E) moving a protocol data unit (PDU) from sender to receiver within a single network
A) D)
Message headers contain which of the following?
A) payload
B) message size
C) source and destination address
D) preamble
E) error checking information
B) C)
Which of the following are characteristics of protocols?
A) connection oriented
B) secure
C) compressed
D) connectionless
E) unreliable
A) D) E)
What technology is primarily used to prevent penetration attacks?
A) encryption
B) hashing
C) cryptographic systems
D) firewall
E) compression
D)
Which of these statements describe a Denial of Service (DoS) attack?
A) Strong authentication techniques using cryptography is the best defense against a DoS attack.
B) Unsuspecting computer users can be part of a DoS attack if their computer has been infected with a malicious bot program.
C) Users of the network usually don’t experience an impact by this type of attack unless they receive a bogus packet.
D) The attacker sends an initial single break-in packet to begin the attack.
E) One or more machines send bogus packets to try to overload the network so valid packets can’t be processed.
B) D) E)
Malware can spread an attacker’s bot program so those computers can be remote controlled by the attacker during a DoSattack on a network. A firewall is the best defense against a DoS. One or more machines send bogus packets to try to overload the network so
valid packets can’t be processed. Legitimate users are denied normal service by the network because of the flood of bogus packets. Servers being attacked often crash. The attacker sends an initial single break-in packet to begin the attack.
Which of the following are objectives of securing a network?
A) elimination of redundancy by compressing data
B) integrity
C) proper ordering of messages
D) confidentiality
E) availability
B) D) E)
A web browser and the web are an example of what type of system architecture?
A) host-based architecture
B) peer-to-peer architecture
C) client-server architecture
D) client-based architecture
E) multitier architecture
C)
