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CompTIA Security+ Cert Prep 8: Network Security and Design Imp Part 1 (Answered) 100% Correct. Updated Fall 2024/2025. $12.49   Add to cart

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CompTIA Security+ Cert Prep 8: Network Security and Design Imp Part 1 (Answered) 100% Correct. Updated Fall 2024/2025.

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CompTIA Security+ Cert Prep 8: Network Security and Design Imp Part 1 (Answered) 100% Correct. Updated Fall 2024/2025.

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  • August 27, 2024
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CompTIA Security+ Cert Prep 8: Network
Security and Design Imp Part 1
(Answered) 100% Correct. Updated Fall
2024/2025.
Transmission Control Protocol (TCP)

connection oriented protocol, sends acknowledgments and guarantee delivery

SYN - opens a connection
FIN - closes a connection
ACK - acknowledges a SYN or FIN

TCP Flags

SYN --->
<----- SYN/ACK
ACK ---->

TCP three way handshake

User Datagram Protocol (UDP)

lightweight connectionless protocol
doesn't send acknowledgements or guarantee deliveries
voice or video applications

Physical, Data Link, Network, Transport, Session, Presentation, Application

Open Systems Interconnection - OSI Model

Network Interface, Internet, Transport, Application

TCP/IP Model

wires, radios, optics

OSI - Physical Layer

data transfers b/t two nodes

OSI- Data Link Layer

Internet Protocol (IP) , ARP, ICMP

OSI - Network Layer

TCP & UDP

, OSI - Transport Layer

Exchanges b/t systems

OSI - Session Layer

Data translation and ecryption

OSI - Presentation Layer

User Programs, HTTP, FTP, SMTP

OSI - Application Layer

Network Address Translation (NAT)

translating private IP addresses to public IP addresses when you communicate over the internet

IP addresses

uniquely identify systems

Between 0 - 255 (256 values)
8 bit binary numbers
2*8 = 256 possible values

Dotted quad notation (IP addresses)

Network Address

front of subnet
identifies network system it is connected to

Host address

end of subnet
uniquely identifies a system on that network

IPv6

uses 128 bits
8 groups of 4 hexadecimal numbers

static IPs

manually assigned to systems by an administrator
must be unique and within the appropriate range for the network
Usually configure servers

Dynamic Host Configuration Protocol (DHCP)

allows the automatic assignment of IP addresses from an administrator configured pool
usually configure end users

Domain Name System (DNS)

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