Exam Flashcards
What is the OSI model?
Open Systems Interconnection (OSI) reference model – Is a set of specifications that described network architecture for connecting dissimilar devices
Name the 7 OSI layers and their corresponding rules.
- Application Layer
- Presentation Layer
- Session Layer
- Transport Layer
- Network Layer
- Data-link Layer
- Physical Layer
Name and describe 3 IEEE protocols.
- Ethernet (IEEE 802.3): This is a logical bus network that can transmit data at 10 Mbps
- Token passing (IEEE 802.4): This is a bus layout that uses a token passing scheme
- Token ring (IEEE 802.5): This is a logical ring network that transmits at either 4 Mbps or 16 Mbps
What is TCP/IP?
TCP/IP - Transmission Control Protocol/Internet Protocol (TCP/IP) is an industry standard suite of protocols that provide communications in a dissimilar environment.
Name 3 benefits of TCP/IP.
- Is an industry standard
- Contains a set of utilities for connecting dissimilar operating systems
- Uses scalable, cross-platform client-server architecture
Name and describe 4 protocols that operate at the TCP/IP Internet Layer.
- Internet protocol (IP): provides connectionless, best-effort delivery routing of packets
- Internet-control message protocol (ICMP): provides control and messaging capabilities
- Address resolution protocol (ARP): determines the data link layer address, or MAC address, for known IP addresses
- Reverse address resolution protocol (RARP): determines the IP address for a known MAC address
What are routed protocols?
Routed protocols - are used at the network layer to transfer data from one host to another across a router.
Give 3 examples of routed protocols.
- Novell Internetwork Packet Exchange (IPX)
- DECnet
- AppleTalk
Define routing protocols.
Routing protocols - allow routers to choose the best path for data from a source to a destination.
Name and describe 5 routing protocols.
- Routing Information Protocol (RIP) - Routing Information Protocol (RIP) is a distance-vector routing protocol that uses hop count as its metric .
- Routing Information Protocol (RIP) Version 2 (RIPv2) - RIPv2 provides prefix routing and sends subnet mask information in routing updates.
- Interior Gateway Routing Protocol (IGRP) - IGRP is a distance-vector routing protocol developed by Cisco.
- Enhanced Interior Gateway Routing Protocol (EIGRP) - EIGRP is a proprietary Cisco protocol. It is an advanced version of IGRP.
- Open Shortest Path First (OSPF) - Open Shortest Path First (OSPF) is a link-state routing protocol.
What is Point-to-Point (PPP)?
PPP is a full-duplex protocol used for the transmission of TCP/IP packets over various non-LAN connections such as ISDN, VPN and Frame Relay.
What is Point-to-Point Tunneling Protocol?
Point-to-Point Tunnelling Protocol (PPTP) - Point-to-point tunnelling protocol (PPTP) is a network protocol that enables the secure transfer of data from a remote client to a private enterprise server by creating a virtual private network (VPN) across TCP/IP-based data networks.
What is IP Security (IPSec)?
IP security (IPSec) is a standard-based mechanism for providing encryption for point-to-point TCP/IP traffic. IPSec provides two main functions, which are authentication header (AH) and encapsulating security payload (ESP).
Name the 5 core TCP?IP protocols.
- File Transfer Protocol (FTP)
- Trivial File Transfer Protocol (TFTP)
- Hypertext Transfer Protocol (HTTP)
- Transmission-Control Protocol (TCP)
- User-Datagram Protocol (UDP)
Name and describe the two methods of assigning IP addresses.
- Static assignments - The system administrator manually assigns and tracks IP addresses for each computer, printer or server on the intranet.
- Dynamic assignments - Dynamic Host Configuration Protocol (DHCP) allows a host to obtain an IP address dynamically, without the network administrator having to set up an individual profile for each device.
