Font size
WorksheetsNetworking and IT
Total questions: 28
Worksheet time: 19mins
What is the reason of thermal paste?
Fill micro gap to increase the contact surface
To make the CPU cooler
Clean the surface of the CPU to avoid any technical issue
What is DHCP?
Server for distributing dynamic IP addresses
Server for forwarding IP address
Dynamic Host Configuration Protocol
Dynamic Host Computer Protocol
Are dynamic IPs fixed for a specific PC?
Yes always be that same IP address
Yes but sometimes the OS reset the IP
No, it changes every start-up
No, it has a lease (time-out)
What is NGINX
Webserver
Programming Language
Framework
API
What does Hyper-Threading Do?
The OS perceive that the Logical core was double of the Physical Core
More Core, More Thread
Scheduling tasks for each doubled core to increase PC performance
Help to remove any free time (time that a core doesn't do anything)
What is CMOS?
Saved Configuration of BIOS
Battery For Motherboard
Configuration of Motherboard for Operating System
Complementary Metal Oxide Semiconductor
What is the relationship between BIOS and UEFI?
UEFI is the next version of BIOS
BIOS is for booting, UEFI is for configuration
UEFI is the next generation of booting system (Before is BIOS)
BIOS is Basic Input Output System and UEFI is Unified Extensible Firmware Interface
Can you use power cable to connect to the Internet?
Yes
Yes but it needs Powerline Adapter
It needs both the device and the router or the modem to connect to Powerline Adapters
A dual-band router has a 2.4GHz band and a 5GHz band. Devices connect on the two bands get the benefit of?
Faster Speed
More Privacy
The 2 bands won't interfere so the network traffic would be easier
It allows more devices to connect to the network
The 2 bands will increase speed ưhen connecting to big sites like Facebook, Youtube,...
WPA2 is?
Next version of WPA
Most used Wi-fi security
Uses TKIP Encryption
Why modern router doesn't use WEP?
Outdated
Weak protection and vulnerable to hackers
Not supported
Governmental encryption used by only the government and the military
AES is?
Advanced Encryption Standard
Encryption Algorithm used in all modern routers and trusted by the government
Next version of WPA2
Used to transfer data through the Internet securely
What does Proxy Server Do?
Act like a middleman to retrieve data for you
Encrypt your data with a 256bit key
Use the proxy's IP address instead of the user's IP address to increase privacy
A server for routing in big companies
Properties of IPv4?
Currently using version
32bit numeric address separated by periods and 8bit number per octet
Support up to 4 billion devices
Example: 5J-7J-5B-44-9N-2O
Properties of IPv6
Next version of IP addresses
128bit hexadecimal address (numbers and alphabets)
Support over 340 undecillion devices
Support over 340 qunitillion devices
Example: 2001:0db8:85a3:0000:0000:8a2e:0370:7334.
What is token in authentication?
A token is given to the user after they sign in to a website.
And next time access that same website, the server will use the token given to the user to authenticate instead of Passwords
Usually in form of JWT (JSON Web Token).
A token is a single element of a programming language. There are five categories of tokens: 1) constants, 2) identifiers, 3) operators, 4) separators, and 5) reserved words.
Controlled Access Units. Networking, Technology, Ring. Share TOKEN Meaning page. Alternatively search Google for TOKEN. 2021.
Crypto tokens are a type of cryptocurrency that represents an asset or specific use and resides on their blockchain.
What are cookies?
They are information about the user (username, passwords, and session ID) that are kept on the client's device
Used to sign in to a website without typing Password and Username Again
Cookies are .txt files
A kind of sweet
What is a session?
A session of connectivity between the server and the client -- the session object holds data that correspond to a user's session. A session is stored on the server.
If your Internet connection is unstable, periodically disconnecting and reconnecting, it can cause a website session to expire.
Session is derived from the HttpSessionStateBase class and is used for persisting data i.e. State Management across requests in ASP.Net MVC Razor. ...
How is a Hub different from a Switch?
A Hub sends data from a computer to all other computers connected to it no matter where the destination is. Briefly, it's public
A switch only forwards the data to the right destination. In short, it's private
A hub is a device that allows Local Devices to connect to the internet
They are the same device but different names
A switch is created to increase network performance and security
What is a DDoS?
Distributed Denial of Service
An attack on a large scale to make a server/ website crash by sending tons of packages
Performed usually by hundred of thousands of computers
A worldwide attack
What is this tool and what it is used for?
A tool that converts applied electrical signals to audio signals.
Tone Generator
Voltmeter
A tool used to measure sound amplitude
What is this tool and what is it used for?
A plug used to test physical ports to identify network issue.
Loopback Adapter
A tool to identify electrical issue
USB
Why is Apple's Silicon M1 chip is so powerful?
Because the chip not only contain CPU but also contains RAM, GPU,... which is easier and faster at retrieving data than traditional CPU
Because it's Apple?
The Architecture of the chip is x86 which have better performance than the common processor
Apple added more transistors and overclock the CPU more to reach this high performance.
What does a CPU do?
Perform a set of instructions to calculate
Store long term data
Perform graphic calculations
Does nothing
What is VLAN?
VLANs allow network administrators to automatically limit access to a specified group of users by dividing workstations into different isolated LAN segments.
VLAN is a wireless networking technology that allows devices such as computers (laptops and desktops), mobile devices (smartphones and wearables), and other equipment (printers and video cameras) to interface with the Internet.
Typically, VLAN cables are used to provide an internet connection, connect devices to a local network.
What are TCP and UDP? (Look at the picture)
TCP (Transmission Control Protocol) - This protocol ensures reliable and in-order delivery of data to the destination.
UDP (User Datagram Protocol) doesn't provide the reliability and ordering of transmissions that TCP does; Data packets may arrive out of order or be lost without notice.
TCP is a set of rules and guidelines for communicating data. Rules are defined for each step and process during communication between two or more computers.
TCP is the next generation of UDP
SDRAM Stands for?
Synchronized Dynamic RAM
Static Dynamic RAM
Super Dynamo RAM
Speed Decelerate Random Access Memory
How do Bluetooth devices sustain connection when there are other EM Waves?
Bluetooth operates between 2.4GHz and 2.48 GHz. They spit up into 79 channels and each pair of devices will communicate through 1 channel and then hop into another channel about 1600 times a second.
1s and 0s are different in wavelength but they are on the same wave (Carry Wave)
It uses radio frequencies to send signals between devices. And to receive the information found in these waves, your radio receiver needs to be set to receive waves of a certain frequency.
Separating the bands of the router may help you to maximize the Bluetooth speeds around your home.
