WorksheetsRandom
Total questions: 39
Worksheet time: 20mins
Bandwidth is the:
number of cycles per second that can be sent through a medium.
difference between the highest and lowest frequencies that can be accommodated on a single channel.
number of frequencies that can be broadcast through a medium.
geographical distance spanned by a network.
total number of bytes that can be sent through a medium per second.
Which of the following is a device that makes possible the translation of digital signals to analog sound signals used by a computer network?
Local area network
TCP/IP
Twisted wire
Modem
DSL
What are the four layers of the TCP/IP reference model?
Software, Hardware, Network Interface, Internet
Application, Hardware, Internet, and Network Interface
Application, Transport, Internet, and Network Interface
Physical, Application, Transport, and Network Interface
Physical, Application, Internet, and Network Interface
Which of the following is the best description of a protocol in a telecommunications network architecture?
A device that handles the switching of voice and data in a local area network
A pathway through which packets are routed
The main computer in a telecommunications network
A standard set of rules and procedures for control of communications in a network
A communications service for microcomputer users
Which of the following is not a characteristic of packet switching?
Packets are reassembled into the original message when they reach their destinations.
Packets are routed through many different paths.
Packet switching requires point-to-point circuits.
Packets travel independently of each other.
Packets include data for checking transmission errors.
In TCP/IP, IP is responsible for which of the following?
Disassembling and reassembling packets during transmission
Breaking messages down into packets
Moving packets over the network
Sequencing the transfer of packets
Establishing an Internet connection between two computers
To ___________ is to place a transmission code within a signal which can be turned back into useful information by a receiver.
Encode
Decode
Recode
Uncode
Which of the following network resources can be load balanced?
Connections through intelligent switches
DNS
Storage resources
All of the mentioned
It is the cable used for telephone lines and Ethernet cables which consists of pairs of copper wire that are twisted together.
coaxial cable
twisted pair cable
fiber-optic cable
wireless cable
It is a high-frequency transmission cable, replaces the multiple wires of telephone lines with a single solid-copper core.
coaxial cable
twisted pair cable
fiber-optic cable
wireless cable
It transmits data as pulses of light through tiny tubes of glass.
coaxial cable
twisted pair cable
fiber-optic cable
wireless cable
It transmits data over short distances; widely used for a variety of wireless devices.
Wi-Fi
microwave
infrared
bluetooth
It uses microwave relay stations; GPS (global positioning system) tracks geographic locations
router
Wi-Fi
satellite
hub
A single instance of a software application serves multiple customers.
Multi-tenancy
Tenancy scaling
Elastic tenancy
Multi-scalable
A third-party provider hosts applications and makes them available to customers over the Internet.
SaaS
IaaS
Paas
Traditional model
Cloud computing model that provides virtualized computing resources over the internet.
IaaS
PaaS
SaaS
RaaS
Provides a platform allowing customers to develop, run, and manage applications without the complexity of building and maintaining the infrastructure.
PaaS
IaaS
SaaS
AaaS
What is the lifecycle of a DNS Request?
Root Server -> Cache/Recursive Server -> TLD Server -> Auth Server
TLD Server -> Root Server -> Cache/Recursive Server -> Auth Server
Cache/Recursive Server -> Auth Server -> TLD Server -> Root Server
Cache/Recursive Server -> Root Server -> TLD Server -> Auth Server
Which DNS record is used to map a Domain Name to an IPv4 Address?
A Record
CNAME Record
MX Record
PTR Record
Which DNS record is used to redirect traffic from one domain to another?
A Record
CNAME Record
MX Record
PTR Record
Which DNS record is used to route traffic to Mail Servers?
A Record
CNAME Record
MX Record
PTR Record
Select Multiple: Which commands are used to query information on Domain Names?
domain
nslookup
dquery
dig
DHCP uses which of the following ports by default?
21
23
68
443
Which of the following uses a 128-bit addressing scheme?
MAC
DHCP
IPv4
IPv6
Which of the following defines the amount of time a host retains a specific IP address before it is renewed or released?
DHCP lease
DNS suffix
Subnet mask
DHCP reservation
What does DDoS stand for?
Distant Denial of Service
Deliberate Denial of Service
Distributed Denial of Service
Delinquent Denial of Service
What is a DDoS attack?
An attack that tries to disrupt or prohibit servers or routers from functioning
An attack that sniffs your neighbors dog
An attack that codes a wall around your server
An attack that sinks your router into oblivion
How can we mitigate TCP flood attacks? (3 ANSWERS)
Hashing(Encrypting) TCP Requests
Micro-Blocks
Denying all requests of TCP traffic
Timeout for releasing memory
How does UDP (User Datagram Protocol) work?
Sends information in the form of a handshake
Sends information in specific form
Sends information one way without order
Sends information only to the internet
What is one way to Mitigate a UDP flood?
Limiting the rate of packet response rates
Find and delete the packets coming in
Deleting incoming requests
Turn off and on your router
What is a Codec?
A file format containing video files, sound files and meta data
Compress data (and decompress it when playing it back) so that you can store and transmit files with a smaller file size
A program to aid a video editor
A coding procedure for storing audio files in a video capturing device
Which HTTP response code means success?
100
200
301
403
What HTTP status code(s) means Client Error?
303
404
405
515
What does SSL stand for?
Separated Socket List
Secure Socket Layer
Secured Special Layer
Security Supressed Layer
What do TLS and SSL have in common?
Communicating with clients and document integrity.
Communicating with confidentiality and data integrity.
