1.2
What is the name of the PDU at the Physical layer?
A bit or symbol
What device operates at the network layer?
A router
What protocols are used at the session layer?
ADSP ASP H.245 NetBIOS PPPTP
What are protocols used at the presentation layer?
AFP ICA LPP NCP NDR
What protocols are used at the Link layer?
ARP NDP OSPF PPP MAC (Ethernet, Wi-FFI, DSL, ISDN)
What are considered the upper layers of the OSI model?
Application, presentation, and session
What are considered the host layers of the OSI model?
Application, presentation, session, and transport
What services does the session layer provide?
Authentication Authorization Session Restoration
What are services provided by the physical layer?
Bit-by-bit delivery Providing a standardized interface Modulation Line Coding Bit synchronization Circuit Switching Multiplexing Carrier sense
What protocols are used at the physical layer?
CAT 5, RJ-45, etc
What is the name of the PDU at the Session, Presentation, and Application layers?
Data
What services are provided by the Presentation layer?
Data Conversion Character code translation Compression Encryption and Decryption
What are the services of the data link layer?
Encapsulation of network layer data packets into frames Frame synchronization LLC Layer MAC Layer
WHat protocols are used at the data link layer?
Ethernet 802.11 Gigabit ethernet Fast ethernet
What device operates at the transport layer?
Firewall
What is the name of the PDU at the Data link layer?
Frame
What is the function of the application layer?
High-level APIs, including resource sharing, remote file access
What devices operate at the physical layer?
Hub, nic, cable, repeater
What protocols are used at the network layer?
IP ICMP ICMPv6 ECN IGMP IPSec EIGRP EGP OSPF RIP
What is the OSI model?
It is a conceptual model that characterises and standardises the communication functions of a telecommunication or computing system without regard to its underlying internal structure and technolog
What is the function of the MAC layer on the Data Link layer?
It is responsible for controlling how devices in a network gain access to a medium and permission to transmit data.
What is the function of the LLC layer on the Data Link layer?
It is responsible for identifying and encapsulating network layer protocols, and controls error checking and frame synchronization.
What are the two sublayers of the data link layer?
MAC Layer LLC Layer
What is the function of the Session layer?
Managing communication sessions, i.e., continuous exchange of information in the form of multiple back-and-forth transmissions between two nodes
What are considered the Media layers of the OSI model?
Network, Data Link, and Physical
What is the name of the PDU at the Network layer?
Packet
What are the seven layers of the OSI model?
Physical Data Link Network Transport Session Presentation Application
What is a PDU?
Protocol Data Unit -A layer of data at any level of the OSI model
What is the function of the data link layer?
Reliable transmission of data frames between two nodes connected by a physical layer
What is the function of the Transport layer?
Reliable transmission of data segments between points on a network, including segmentation, acknowledgement and multiplexing
What is the name of the PDU at the transport layer?
Segment / Datagram
WHat is the function of the Network layer?
Structuring and managing a multi-node network, including addressing, routing and traffic control
What devices operate at the Data link layer?
Switch, bridge, acces point
What protocols are uses at the transport layer?
TCP UDP DCCP SCTP RSVP
What are protocols used at the Application layer?
Telnet FTP TFTP SMTP BOOTP DNS SNMP X Window
What is the function of the Presentation layer?
Translation of data between a networking service and an application; including character encoding, data compression and encryption/decryption
What is the function of the physical layer?
Transmission and reception of raw bit streams over a physical medium
What are considered the lower layers of the OSI model?
Transport, network, data link, and physical
