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WorksheetsNetworking Unit 1 Study Guide
Total questions: 100
Worksheet time: 50mins
Daniel is studying computer networks and wants to understand the purpose of the OSI model. What is the primary purpose of the OSI model?
Standardize networking protocols to allow communication between different systems
Provide a physical connection between devices
Encrypt data for secure transmission
Manage user access to network resources
During a computer networking class, Evelyn and Arjun were discussing what two protocols are used for transmitting data and on what layer?
TCP and UDP on the Transport layer
HTTP and HTTPS on the Application layer
IP and ICMP on the Network layer
Ethernet and Wi-Fi on the Data Link layer
Abigail is setting up a home network and needs to know which of the following are devices used on Layer 1 of the OSI model?
Router
Switch
Hub
Repeater
During a network troubleshooting session, Samuel needs to determine which layer of the OSI model is responsible for routing and forwarding. Which layer should he focus on?
Application Layer
Transport Layer
Network Layer
Data Link Layer
During a computer networking class, Mason asked, 'IP addresses are found at what layer of the OSI model?'
Application layer
Transport layer
Network layer
Data link layer
During a computer networking class, Aria asked which layer of the OSI model would MAC addresses be found?
Application Layer
Transport Layer
Network Layer
Data Link Layer
Harper is using a web browser to access an online service. Which layer of the OSI model does Harper interact with?
Application Layer
Presentation Layer
Session Layer
Transport Layer
Kai is learning about network communication. What information does encapsulation add to a packet?
Source and destination addresses
Error-checking information
Data payload
All of the above
When Noah receives a package wrapped in multiple layers, what does he do to access the item inside?
Removes the outer layers of data
Adds additional layers to data
Encrypts the data
Compresses the data
Mia and Aiden are setting up a video call. Mia wants to ensure a stable connection, while Aiden is more concerned about speed. What is the difference between TCP and UDP?
TCP is connection-oriented, while UDP is connectionless.
TCP is faster than UDP.
UDP guarantees delivery of data packets.
TCP is used for streaming services.
Aria is setting up a network and wants to understand the purpose of TCP flags. What is their purpose?
To identify the start and end of a TCP connection
To manage the flow of data in a network
To ensure data integrity during transmission
To control the size of data packets
During a network security class, Daniel was asked to give three examples of TCP flags.
SYN
ACK
FIN
RST
Mia is learning about computer networks. She wants to know what the Data-Link Layer encapsulates data from the Network Layer into. Can you help her?
Frames
Packets
Segments
Bits
William is setting up a new home network and needs to configure the router settings. He comes across a term called maximum transmission unit (MTU). What is a maximum transmission unit (MTU)?
The smallest packet size that can be transmitted over a network
The largest packet size that can be transmitted over a network
A type of network protocol
A measure of network speed
Jackson is setting up a new office and needs to decide on the network topology. What is a network topology?
A type of network security protocol
The arrangement of various elements in a computer network
A software application for network management
A hardware device used in networking
Emma is setting up a network for her small business. What is the biggest downfall of using a star network?
Single point of failure
Complex to set up
High cost of cables
Limited scalability
Luna and Mason are setting up a network for their small office. What is a major downfall of choosing a ring network for their setup?
Data packets can only travel in one direction
It is expensive to install
It requires a central hub
It is difficult to troubleshoot
Evelyn is setting up a small office network and wants to choose a network topology that requires a lot less cable than other types of topologies. Which one should she choose?
Bus topology
Star topology
Ring topology
Mesh topology
Sophia and David are setting up a network for their new startup. What is the difference between a client-server network and a peer-to-peer network?
A client-server network has a central server, while a peer-to-peer network does not.
A peer-to-peer network has a central server, while a client-server network does not.
Both networks have a central server.
Neither network has a central server.
James is setting up a network in his new apartment. Which of the following is a type of network that covers a small geographic area like his home?
LAN
WAN
CAN
PAN
Abigail is setting up a home office and needs to understand where the network demarcation point is. What is a network demarcation point?
The point where the public network ends and the private network begins
A device that connects multiple networks together
A protocol used for secure communication over a network
A type of network topology
David is setting up a server for his company and wants to run multiple virtual machines on a single physical machine. Which of the following is a virtualization technology that he should use?
vSwitch
vNIC
NFV
Hypervisor
Abigail is trying to understand how dial-up differs from DSL when providing internet. Can you help her?
Dial-up uses a phone line while DSL uses a broadband connection.
DSL is slower than dial-up.
Dial-up is always on, while DSL requires a connection each time.
DSL does not allow simultaneous voice and data transmission.
Abigail is researching internet options for her new single-family home. What form of internet access is the most popular option and how is the internet provided?
DSL
Cable
Fiber Optic
Satellite
Jackson's company is considering upgrading their internet connection. What advantage does a leased line provide to his business?
Dedicated bandwidth
Lower cost
Shared connection
Limited data usage
Noah is setting up his home internet connection. What common tool sits between Noah and the telephone company?
Modem
Router
Switch
Firewall
During a school project, Mason and Sophia were asked to identify a type of cable commonly used in networking. What is this twisted cable more commonly known as?
Twisted pair cable
Coaxial cable
Fiber optic cable
Ribbon cable
Mia and Rohan are setting up their new home office. What are the two most common cables they might need?
HDMI and USB
Ethernet and Coaxial
VGA and DVI
Fiber Optic and RCA
Evelyn and Grace are setting up a small office network. What type of cable would they use to connect two switches together?
Crossover cable
Straight-through cable
Fiber optic cable
Coaxial cable
Luna is setting up a home network and needs to connect her router to a switch. What type of cable should she use?
Ethernet cable
USB cable
HDMI cable
VGA cable
Daniel is setting up his home internet and television. What cable should he use to connect to the service provider?
Coaxial cable
Fiber optic cable
Ethernet cable
HDMI cable
Elijah and Olivia are setting up a new data center. How do twinaxial cables differ from coaxial cables and where are they commonly found?
Twinaxial cables have two conductors and are commonly found in data centers.
Twinaxial cables have a single conductor and are used in television broadcasting.
Coaxial cables have two conductors and are used in high-speed internet connections.
Coaxial cables are used in data centers and have a twisted pair design.
Michael is setting up a new office network and needs to ensure the wired Ethernet connections are up to standard. What organization controls the standard for wired Ethernet?
IEEE
ISO
ITU
ANSI
Abigail is setting up a network and needs to fill in the blank showing the correct pin alignment for a crossover cable.
Correct pin alignment
Incorrect pin alignment 1
Incorrect pin alignment 2
Incorrect pin alignment 3
Jackson is setting up a high-speed internet connection for his new office. What is an advantage of using fiber-optic cables over twisted-pair Ethernet cables?
Higher bandwidth
Lower cost
Easier installation
More flexibility
Michael is setting up a new office network and is considering using fiber-optic cables instead of twisted-pair Ethernet cables. What is a drawback of using fiber-optic cables in this scenario?
Higher cost
Lower bandwidth
Less secure
More interference
Scarlett and Noah are setting up a network in their office. True or False: Single-mode and multimode cables are interchangeable.
True
False
Samuel and Anika are setting up a network for their new office. They need to decide between using a single-mode fiber-optic cable and a multimode fiber-optic cable. What is the difference between these two types of cables?
Single-mode cables are designed for long-distance communication, while multimode cables are used for shorter distances.
Single-mode cables have a larger core diameter than multimode cables.
Multimode cables are more expensive than single-mode cables.
Single-mode cables are used for local area networks, while multimode cables are used for wide area networks.
During a networking class, Jackson was asked about the fiber-optic standards set under the IEEE 802.3. What should he answer?
IEEE 802.3z and IEEE 802.3ae
IEEE 802.3af and IEEE 802.3at
IEEE 802.3i and IEEE 802.3u
IEEE 802.3ab and IEEE 802.3an
Emma and Arjun are working on a project to improve internet speed in their neighborhood. They discover that the ability to send multiple data/digital signals down one strand of fiber-optic cable by using different light wavelengths is known as what?
Time Division Multiplexing
Frequency Division Multiplexing
Wavelength Division Multiplexing
Code Division Multiplexing
Michael is setting up a vintage telephone in his home. What connector should he use for the telephone connections?
RJ11
USB
HDMI
VGA
During a school project, Isla and Ethan are setting up a network in their computer lab. What connector is commonly used with twisted-pair Ethernet cables?
RJ11
RJ45
USB
HDMI
Samuel is setting up a home theater system and needs to connect his cable box to the TV. What type of connector should he use for the coaxial cable?
RJ45
USB
BNC
HDMI
During a school project, Anika and Emma are discussing the types of connectors used in fiber-optic cables. What is the difference between an APC and a UPC connector with fiber-optic cables?
APC connectors have an angled end face, while UPC connectors have a flat end face.
APC connectors are used for copper cables, while UPC connectors are used for fiber-optic cables.
APC connectors are more expensive than UPC connectors.
APC connectors are used for long-distance communication, while UPC connectors are used for short-distance communication.
During a science project, Oliver and Abigail are learning about communication devices. What is the meaning behind the term transceiver?
A device that can both transmit and receive communications
A device that only transmits communications
A device that only receives communications
A device that stores data
Lily is setting up a new office network. What is the purpose of a patch panel in her setup?
To connect and manage multiple network cables
To increase internet speed
To provide wireless connectivity
To act as a firewall
During a school project, Henry and Charlotte were tasked with setting up a network for their computer lab. They needed to use a patch panel for fiber optics. What is this panel known as?
Fiber Distribution Panel
Optical Distribution Frame
Fiber Optic Splice Closure
Optical Network Terminal
Grace and Ava are setting up a new office network. What are two benefits of having a patch panel?
Improved cable management and organization
Increased network speed
Simplified troubleshooting and maintenance
Reduced hardware costs
During a school project, Arjun and Priya were tasked with setting up a network. They used punchdown blocks to create a connection by:
Using a soldering technique
Crimping wires together
Inserting wires into metal slots
Twisting wires manually
Ethan is setting up a network in his new office. Name two common punchdown blocks he might use.
66 block and 110 block
RJ45 and RJ11
Cat5 and Cat6
Fiber and Coaxial
The word “Krone” comes from which language?
German
French
Spanish
Italian
When dealing with IPv4, why is there a need for specific addresses to be reserved for private networks?
To ensure security and privacy within a local network
To allow for unlimited public IP addresses
To prevent network congestion on the internet
To enable faster internet speeds
How does a device on a public network talk to a device on a private network?
Through a firewall
Using a VPN
Via a proxy server
By direct connection
If two computers have the same public IP address but a router knows which computer on the private network to send packets to based on their different port number, what is being used?
Network Address Translation (NAT)
Dynamic Host Configuration Protocol (DHCP)
Domain Name System (DNS)
Virtual Private Network (VPN)
A virtual IP (VIP) address is a(n) ________.
physical address assigned to a network interface
IP address that is not assigned to a specific server
address used for local network communication
unique identifier for a device on a network
Define the following terms
Term 1: Definition A
Term 2: Definition B
Term 3: Definition C
Term 4: Definition D
What is the IPv4 address range in binary form?
00000000.00000000.00000000.00000000 to 11111111.11111111.11111111.11111111
00000000.00000000.00000000.00000001 to 11111111.11111111.11111111.11111110
00000000.00000000.00000000.00000000 to 11111111.11111111.11111111.11111110
00000000.00000000.00000000.00000001 to 11111111.11111111.11111111.11111111
What is the IPv4 address range in common decimal form?
0.0.0.0 to 255.255.255.255
0.0.0.0 to 127.255.255.255
128.0.0.0 to 191.255.255.255
192.0.0.0 to 223.255.255.255
What is the loopback address for IPv4 and what does it allow a machine to do?
127.0.0.1; It allows a machine to test its own network interface.
192.168.1.1; It allows a machine to connect to a local network.
10.0.0.1; It allows a machine to connect to a VPN.
255.255.255.0; It allows a machine to set a subnet mask.
What is the subnet mask for 192.168.17.2/24?
255.255.255.0
255.255.0.0
255.0.0.0
255.255.255.255
Which of the following terms is defined as a method for encapsulating packets of one protocol within another protocol?
Tunneling
Dual Stack
Shorthand notation
Router advertisement
Stateless Address Autoconfiguration
What is a port number?
A unique identifier for a process
A numerical label assigned to each device on a network
A number used to identify a specific process or service on a computer
A type of network protocol
In accordance with RFC 3232, what ports are known as well-known ports?
Ports 0 to 1023
Ports 1024 to 49151
Ports 49152 to 65535
Ports 65536 and above
Is there a difference between the port numbers used by HTTP and HTTPS? What is/are the port(s) for HTTP and HTTPS?
HTTP uses port 80 and HTTPS uses port 443
HTTP uses port 443 and HTTPS uses port 80
Both HTTP and HTTPS use port 80
Both HTTP and HTTPS use port 443
Define the protocols for each port. Protocols with their respective port number(s):
Telnet - Port 23, SSH - Port 22, FTP - Ports 20/21, TFTP - Port 69
Telnet - Port 22, SSH - Port 23, FTP - Ports 21/22, TFTP - Port 70
Telnet - Port 21, SSH - Port 20, FTP - Ports 22/23, TFTP - Port 68
Telnet - Port 69, SSH - Port 21, FTP - Ports 23/24, TFTP - Port 22
What is the well-known port number for Server Message Block (SMB)?
445
80
21
22
You need to access a desktop remotely using the Remote Desktop Protocol (RDP), what well known port would you use?
3389
80
22
443
What is the most common protocol used to send data across a network?
HTTP
FTP
SMTP
TCP/IP
What is the internet Control Message Protocol (ICMP)?
A protocol used for error messages and operational information queries
A protocol for transferring files over the internet
A protocol for sending emails
A protocol for streaming video content
What two command-line tools use ICMP traffic?
ping and traceroute
netstat and nslookup
ftp and telnet
ssh and scp
What is the difference between GRE and IPSec?
GRE is a tunneling protocol, while IPSec is a security protocol.
GRE provides encryption, while IPSec does not.
IPSec is used for routing, while GRE is used for security.
Both GRE and IPSec are used for encryption.
What protocol is used for video conferencing, streaming videos, and voice calls?
HTTP
FTP
SMTP
RTP
What protocol is used for most websites, emails, and file transfers?
HTTP
SMTP
FTP
TCP/IP
What is the difference between TCP and UDP?
TCP is connection-oriented, while UDP is connectionless.
TCP is faster than UDP.
UDP guarantees delivery of data packets.
TCP is used for streaming services.
Which protocol uses the three-way handshake process?
TCP
UDP
HTTP
FTP
Between TCP and UDP, which protocol is the fastest?
TCP
UDP
Both are equally fast
Neither
What is the purpose of DHCP?
To assign IP addresses to devices on a network
To encrypt data for secure transmission
To manage file storage on a server
To monitor network traffic
A DHCP server can be found on which of the following devices?
Router
Printer
Monitor
Keyboard
What is the DHCPDISCOVER message?
A message sent by a client to locate available DHCP servers
A message sent by a server to acknowledge a client's request
A message sent by a client to request an IP address
A message sent by a server to offer an IP address to a client
What is a DHCPRELEASE message?
A message sent by a client to release its IP address
A message sent by a server to assign an IP address
A message used to request an IP address
A message used to renew an IP address lease
What port does the DHCP service run on?
67
80
443
21
Which of the following terms refers to the duration for which an IP address is assigned to a device in a network?
Dynamic Assignment
Static Assignment
Exclusion Ranges
Lease Time
Available Leases
What is the purpose of a Domain Name System (DNS)?
To translate domain names to IP addresses
To store website data
To provide internet security
To manage email services
How does DNS benefit end-users accessing websites?
It speeds up the process of finding websites.
It provides security for online transactions.
It allows users to access websites without an internet connection.
It translates domain names into IP addresses.
Root servers are located and purposefully spread out across the planet because:
They provide faster internet speeds.
They ensure global accessibility and redundancy.
They store all internet data.
They are used for local network management.
Which DNS record is used to map a domain name to an IP address?
A
CNAME
SOA
PTR
NS
What is DNS cache?
A temporary database maintained by a computer's operating system
A type of malware
A hardware component in a computer
A programming language
If a query is not successful using DNS cache or with recursive lookup, where does the query go then?
To the root DNS server
To the local DNS server
To the authoritative DNS server
To the ISP's DNS server
What is a reverse DNS or reverse lookup?
A process to find the domain name associated with an IP address
A method to encrypt DNS queries
A technique to speed up DNS resolution
A way to block unwanted IP addresses
What is the job of NTP?
To synchronize the clocks of computers over a network
To provide network security
To manage network traffic
To allocate IP addresses
What role does NTP play in network security?
Synchronizes time across network devices
Encrypts data packets
Manages network traffic
Provides firewall protection
A stratum is a layer of what?
Rock
Water
Air
Soil
How many different stratum levels are there and what do they represent?
Two levels: Upper and Lower, representing different ecological zones.
Three levels: Surface, Intermediate, and Deep, representing oceanic layers.
Four levels: Primary, Secondary, Tertiary, and Quaternary, representing geological time periods.
Five levels: A, B, C, D, and E, representing soil horizons.
How does a client differ from an NTP server?
A client requests time updates, while an NTP server provides time updates.
A client provides time updates, while an NTP server requests time updates.
Both client and NTP server provide time updates.
Both client and NTP server request time updates.
What layer of the three-tiered approach network architecture contains computers, servers, printers, and other end devices?
Access Layer
Distribution Layer
Core Layer
Application Layer
What layer of the three-tiered approach provides redundancy in case a network device was to fail without incurring any downtime?
Access Layer
Distribution Layer
Core Layer
Application Layer
What layer of the three-tier approach contains high-speed interconnection devices and is more concerned with transferring data in and out of the network as quickly as possible?
Access Layer
Distribution Layer
Core Layer
Application Layer
What architecture utilizes APIs to talk with network devices and makes network changes based on the current operations of the entire network?
Software-Defined Networking (SDN)
Traditional Networking
Peer-to-Peer Networking
Client-Server Networking
Which of the following best defines the Management Plane?
It is responsible for managing network resources and policies.
It is the layer where user applications operate.
It controls the flow of data between devices.
It consists of the physical hardware and infrastructure.
What layer of the spine and leaf architecture has a lot of ports so many devices can be connected to them to gain access to the network?
Spine Layer
Leaf Layer
Core Layer
Access Layer
