Exam 2A

What are the two types of transmissions supported?

Connection oriented and connectionless

What type of session is TCP?

Connection-oriented

IP transmits using which type of transmission?

Connectionless

What type of session is UDP?

Connectionless

__________ routing is a transmission method in which packets make their way from the source device to the destination device without regard fro whether or not the device is available to receive the information

Connectionless

What are the two transmission metrics that routing protocols base their routing decisions on?

Distance vector and link state

What is in the network layers attached packet end frame?

Error check value

A Network Operating System (NOS), such as Linux or Windows Server 2008, must be used in addition to the 'normal' operating system, such as Windows on a server in a dedicated server LAN

False

IP is responsible for error-free delivery of packets on a TCP/IP network

False

The Network Interface Card (NIC) permits a computer to be physically connected to a network's cable, which provides the network layer connection among the computers in the network

False

The network layer sits directly between the application layer and the data link layer in the Internet five-layer network model

False

The transport layer routes messages through the network selecting the best path from the source to the destination station

False

When using dynamic routing, routing decisions are always made by a central host or server

False

What is the protocol data unit of the data link layer?

Frame

What is included in the network layer's pdu?

IP addresses

two types of IP addressing

IPv4 & IPv6

What is the predominant network protocol in use today?

Internet Protocol(IP)

What is the benefit of encapsulation?

It allows a layer at one end of a communication channel to focus on the header information attached by its corresponding layer at the other end and ignore the information attached by other layers

_______ is a type of dynamic routing

Link state

The transport layer performs what 3 functions?

Linking the application layer to the network, segmenting, and session management

The two parts of an IP address are the ________ and ________.

Network & host portion

What is the PDU associated with the network layer?

Packets

Assume that more than one application program is using the same communications line on a particular computer. To be able to decide to which application program a message should be delivered on this computer, TCP/IP relies on the:

Port address

Connection oriented transmission

Requires some type of circuit set up process to instantiate the connection between the communicating devices

Address Resolution Protocol

Responsible for resolving IP addresses of local devices to their associated MAC addresses

_______ is the process of determining the path that a message will travel from sending computer to receiving computer

Routing

Example of an Interior Routing Protocol

Routing Information Protocol or Open Shortest Path First

The network layer performs what 2 functions?

Routing and addressing

The network layer is responsible for what?

Routing packets from a source device to a destination device

What is the PDU associate with the transport layer?

Segments

How does TCP establish a connection between two devices?

Three way handhake

Connectionless transmissions

Transmits the information without regard for whether or not the recipient is available and able to receive the information

The ______ layer sits between the network and application layer

Transport

A hope in metric used in routing that is defined as one link or circuit between two devices

True

LANs can be categorized as either dedicated (with a dedicated server) or peer-to-peer (without a dedicated server)

True

One important function of a Network Operating System (NOS) is a directory service

True

The source port identifier in the TCP header tells the TCP software on the destination computer, which application on the destination computer it should pass the packet to

True

The transport layer process running on the destination computer, reassembles the fragmented application message before passing it up to the application layer

True

In IP, which transport layer protocol works best fro applications that stream voice and video data?

UDP

Active Directory Services

Window environment of a directory service, organized in a hierarchical tree structure

domain

a group of computers that share a set of network resources

LAN

a group of interconnected computers that share information and resources

hub

a layer one(physical layer) device that provides a central point for interconnecting devices

subnet

a logical grouping of computers that tend to be located in close physical proximity to each other and need to share resources

Autonomous system

a network that is controlled by a single organization

ACK

acknowledgement

Network operating system(NOS)

allows the network server to share data and resources with the other devices in the network

Clients

computing devices in the network that need to connect to share resources

3 session phases of connection-oriented messaging

connection setup, data transmission, and connection termination phase

Exterior Routing Protocol

connects together routing devices of an autonomous system

Interior Routing Protocol

detailed routing information within a autonomous system

How does static routing make its routing decisions?

devices rely on a fixed routing table to make routing decisions

How does dynamic routing make its routing decisions?

devices share status information with other devices and that information is used to update each device's routing tables

With _____ routing, computers or routers count the number of hops along a route, periodically exchange this information with their neighbors, and rely on that information to make routing decisions

distance vector

What is the process of attaching header information to the pdu of a higher layer called?

encapsulation

directory service

feature that allows the network administrator to manage and track all of the resources such as file servers, print servers, application software and users in the network

What does the transport layer append to each segment?

headers

Port numbers

identify the source and destination applications that are communicating with each other

router

layer three (network layer) device that is used to interconnect subnets and networks

switch

layer two (data link layer) device that directly connects device pairs using a dedicated channel

NAK

non-acknowledgement

2 types of LAN configurations

peer to peer and dedicated-server

IP:

performs routing

Registered ports

port numbers 1024 through 49151

Dynamic or private ports

port numbers 49152 - 65535

wireless access points

radio transceivers that allow wireless NIC installed on client workstations to connect to the wired network

_______is not an important function of the transport layer

routing

SEQ

sequence number

TCP uses ______ so that the destination station can reassemble the packets into the correct order

sequence number

Segment

small, manageable unit the transport layer divides a message into for transmission

SYN

synchronization

SYN/ACK

synchronize and acknowledgement

Segmentation

taking application message that exceed a maximum size limit and breaking them into a set of smaller segments that can each be efficiently routed through the network and then re-assembled on the receiving send

Network Interface Cards (NIC)

the hardware component needed to connect a device to a network

IPv4 contains two parts:

the network & host portion

Routing

the process of determining the next device a packet should be sent to on its way from the source to the destination

domain controller

the server that is responsible for managing the available resource and controlling who can access them

benefit of subnetting

to partition large LANs into manageable units, and enhancing the security and performance of LANs

TCP stands for ______

transmission control protocol

Link state

transmission metric used that bases routing decisions on a combination of hop count, circuit speed, circuit utilization, and other factors

Distance vector

transmission metric used that bases routing decisions on the number of hops between a source and a destination device

UDP stands for _____

user datagram protocol

IEEE 802.11

wireless

omnidirectional

wireless access point antenna that can send and receive signals from all directions surrounding the antenna

direction manner

wireless access point antenna that limits the direction in which signals can be sent and received, can not transmit outside of building walls

What is the transport layer responsible for at the sending end?

-Application messages are broken into segments -Individual segments are numbered -Each segment is passed to the network layer for transmission to the destination

What is the transport layer responsible for at the receiving end?

-Incoming segments are accepted from the network layer -Segments are checked to ensure they are error free -Acknowledgements are sent to the sender for each received segments -Application messages are re-assembled from the received segments and forwarded to the application layer

The network layer provide 3 key services that support transmission of data over distance

1) logical host addressing 2) message encapsulation 3) connectionless packet forwarding

What is the port number of POPv2?

109

IPv6 is based on a __bit addressing scheme

128

How long is each port number?

16 bits

What is the port number of FTP?

20 & 21

What is the port number of IMAP?

220

What is the port number of telnet?

23

What is the port number of SMTP?

25

How many addresses are provided through IPv6?

2^128

How many addresses are provided through IPv4?

2^32

IPv4 is based on a __ bit addressing scheme

32

What is the port number of HTTP?

80

ARP

Address Resolution Protocol