OSI and TCP/IP Model Flashcards
What are the 7 layers of the OSI Reference Model (Open Systems Interconnection)
- Physical
- Data Link
- Network
- Transport
- Session
- Presentation
- Application
What are the 4 layers of the TCP/IP model and which layers in the OSI model do they correspond to?
(0). Hardware
1. Network Interface (2. Data Link)
2. Internet (3. Network)
3. (Host-to-Host) Transport (4. Transport)
4. Application (5. Session, 6. Presentation & 7. Application)
What are the major functions and the delivery unit of the Application Layer?
Delivery
- Message/data
Functions
- High level protocols
What are the major functions and the delivery unit of the Transport Layer?
Delivery
- Segment datagram
Functions
- End-to-end; connection setup, flow control, error control, multiplex
What are the major functions and the delivery unit of the Network Layer?
Delivery
- Packet
Functions
- Addressing and routing: IP supports transmitting packets from any source on the network and tries to deliver them to the destination regardless of the path of each packet
What are the major functions and the delivery unit of the Link (network interface) Layer?
Delivery
- Frame
Functions
- Media access control; hop-by-hop flow control and error control: makes it possible for the packets to cross the physical link between directly connected devices (WANs, LANs)
What are the major functions and the delivery unit of the Physical Layer?
Delivery
- Bit, Symbol
Functions
- Physical and electrical specifications for connectors, cabling, NICs, etc.
What protocols does the Application layer have?
Name System
- DNS
File Sharing
- NFS
Host Config
- BOOTP
- DHCP
Network Management
- SNMP
- RMON
File Transfer
- FTP
- TFTP
Email & News
- RFC822/MIME
- SMTP
- POP/IMAP
WWW & Gopher
- HTTP
- Gopher
Interactive
- Telnet
- “r”-commands
- IRC
What protocols does the Transport layer have?
UDP
TCP
What protocols does the Internet layer have?
Internet Protocol (IP/IPv4, IPv6)
- IP NAT
- IPSec
- Mobile IP
IP Support Protocols
- ICMP/ICMPv4, ICMPv6
- ND (Neighbour Discovery)
IP Routing Protocols
What protocols does the Network layer have?
IP
IPSec
ICMP
What attacks occur on the internet and which layer do they attack?
Application: exploit
Presentation: phising
Session: hijacking (XSS, malware)
Transport: Recon/DoS (TCP session hijack, SYN flood)
Network: MITM, smurfing
Data link: MAC spoofing
Physical: sniffing
