INF02 theoretical

So the exam is split into two parts, practical and theoretical, I already analyzed the practical part, and now I will focus on the theoretical part. I'll go over all the parts covered in the theoretical part of the exam.

:::important Warning! This only covers a small part of the repeating and common questions! :::

Protocols

Protocol	Description	Port
HTTP	HyperText Transfer Protocol, used for web traffic	80
HTTPS	HyperText Transfer Protocol Secure, used for secure web traffic	443
DNS	Domain Name System, used for resolving domain names to IP addresses	53
DHCP	Dynamic Host Configuration Protocol, used for assigning IP addresses	67
ICMP	Internet Control Message Protocol, used for network diagnostics	N/A
ARP	Address Resolution Protocol, used for mapping IP addresses to MAC addresses	2048
RARP	Reverse Address Resolution Protocol, used for mapping MAC addresses to IP addresses	2050
WINS	Windows Internet Name Service, used for name resolution in Windows networks	42
CSMA/CD	Carrier Sense Multiple Access with Collision Detection, used in Ethernet networks	N/A
IPX/SPX	Internetwork Packet Exchange/Sequenced Packet Exchange, used in Novell networks	396
NetBEUI	NetBIOS Extended User Interface, used in Windows networks	137
SSL	Secure Sockets Layer, used for securing communications over a computer network	N/A
IMAP	Internet Message Access Protocol, used for retrieving email from a mail server	143
RTP	Real-time Transport Protocol, used for delivering audio and video over IP networks	5004

Linux Commands

Command	Description
ifconfig	Displays all current TCP/IP network configuration values
ping	Tests connectivity to another IP address
traceroute	Traces the route taken by packets to a destination
netstat	Displays active connections and listening ports
nslookup	Queries the DNS to obtain domain name or IP address mapping
tar	Archives files into a single file, often used for backups
free	Displays information about free and used memory in the system
lzma	Compresses files using the Lempel-Ziv-Markov chain algorithm
uptime	Displays how long the system has been running
uname	Displays system information, including the kernel version
ifconfig	Displays all current TCP/IP network configuration values

Windows Commands

Command	Description
ipconfig	Displays all current TCP/IP network configuration values
ping	Tests connectivity to another IP address
tracert	Traces the route taken by packets to a destination
netstat	Displays active connections and listening ports
nslookup	Queries the DNS to obtain domain name or IP address mapping

Linux systems

System	Description
ulink	User-level link management utility
udev	Device manager for the Linux kernel
cal	Calendar utility for displaying dates and events
set	Command for setting environment variables
gdb	GNU Debugger, a debugging tool for programs

Terminology

Term	Description
NEXT	Near End Crosstalk, a type of crosstalk that occurs between pairs of wires in a cable
USB	Universal Serial Bus, a standard for connecting peripherals to a computer
AGP	Accelerated Graphics Port, a high-speed point-to-point channel for attaching a video card