Topic 3 Flashcards
What is flow control?
Manages the rate of data transmission and defines how much information can be sent and the speed at which it can be delivered.
What term is used for communication from one-to-many recipients?
Multicast
What term is used for communication from one-to-all recipients?
Broadcast
What term is used for communication from one-to-one recipient?
Unicast
What is the function of the Application layer in the OSI Model?
Contains protocols used for process-to-process communications.
What is the function of the Presentation layer in the OSI Model?
Provides for common representation of the data transferred between application layer services.
What is the function of the Session layer in the OSI Model?
Provides services to the presentation layer and to manage data exchange.
What is the function of the Transport layer in the OSI Model?
Defines services to segment, transfer, and reassemble the data for individual communications.
What is the function of the Network layer in the OSI Model?
Provides services to exchange the individual pieces of data over the network.
What is the function of the Data Link layer in the OSI Model?
Describes methods for exchanging data frames over a common media.
What is the function of the Physical layer in the OSI Model?
Describes the means to activate, maintain, and de-activate physical connections.
What is the function of the Application layer in the TCP/IP Model?
Represents data to the user, plus encoding and dialog control.
What is the function of the Transport layer in the TCP/IP Model?
Supports communication between various devices across diverse networks.
What is the function of the Internet layer in the TCP/IP Model?
Determines the best path through the network.
What is the function of the Network Access layer in the TCP/IP Model?
Controls the hardware devices and media that make up the network.
Map the OSI layer 7 to the TCP/IP model.
Application
Map the OSI layer 6 to the TCP/IP model.
Presentation
Map the OSI layer 5 to the TCP/IP model.
Session
Map the OSI layer 4 to the TCP/IP model.
Transport
Map the OSI layer 3 to the TCP/IP model.
Internet
Map the OSI layer 2 to the TCP/IP model.
Network Access
Map the OSI layer 1 to the TCP/IP model.
Physical
What is data encapsulation?
It’s a top down process of placing one message format where protocols add their information to the data inside another message format and is repeated by each layer.
Fill in the correct protocol data unit (PDU) for the Transport layer.
Segment
Fill in the correct protocol data unit (PDU) for the Network layer.
Packet
Fill in the correct protocol data unit (PDU) for the Data Link layer.
Frame
Fill in the correct protocol data unit (PDU) for the Physical layer.
Bits
What is the role of network layer addresses?
Responsible for delivering the IP packet from original source to the final destination.
What is the role of data link layer addresses?
Responsible for delivering the data link frame from one network interface card (NIC) to another NIC on the same network.
What addresses are contained in the IP packet header?
Source IP address, Destination IP address
What addresses are contained in the Ethernet Frame Header?
Source MAC address, Destination MAC address
What is the purpose of the Default Gateway?
The default gateway is the ‘door’ to all other remote locations and has an IP address that is part of the local LAN.
When is an Ethernet Frame sent to the Default Gateway?
When the final destination is remote, the data link frame will use the MAC address of the default gateway.
What is the Default Gateway address for PC1 and FTP Server?
192.168.1.1
What is the Default Gateway address for the Web server?
172.16.1.1
What is the address of the default gateway (DGW)?
The IP address of the DGW is the IP address of the router interface connected to the local LAN.
What happens if a device does not have the default gateway address configured?
All devices on the LAN must be told about this address or their traffic will be confined to the LAN only.
