Section 2 - Network Models Flashcards
___ are used to represent how networks function.
Models
Name both network models.
- OSI 7-layer model
- TCP/IP 4-layer model
Data that is sent in chunks is called a __.
Frame
Frames are a maximum of __ bytes in size.
1500 bytes
What piece of hardware in the computer manifests and digests frames?
NIC (Network Interface Card)
Build a model of a frame and include all data chunks contained within a frame.
Destination MAC Address –> Source MAC Address –> Ether Type (port number[s]) –> Data –> Frame Check Sequence (FCS)
A MAC address is a unique __-bit identifier for a NIC.
48-bit
A __ __ address is included in a frame in order for the destination computer to send data back to it’s source computer.
Source MAC address
A __ transmission is addressed to a single node on a network whereas a __ transmission is sent to every node on a network.
A) Unicast, multicast B) Unicast, broadcast C) Broadcast, unocast D) Singlecast, multicast E) I give up, I don't know
B) Unicast, broadcast
Choose the correct IPv6 address.
A) 2001:0D8B8:FE01::
B) :2001:0D8B8:FE01
C) 2001::0D8B8:FE01:4020
A) 2001:0D8B8:FE01::
Which part within a frame never changes?
IP Packet
__ numbers help direct packet traffic between the source and destination.
Port numbers
Packets have __ numbers so the network software can reassemble the file correctly.
A) Port
B) File
C) Sequence
C) Sequence
Which is connection-oriented and which is connection-less?
UDP vs TCP
Connection-oriented = TCP Connection-less = UDP
Define binary
The 1’s and 0’s that is essentially “data.”
Which part of the network does packetized data live?
Frames
Repeater (Hub): takes the incoming signal and __ it to all nodes connected.
Duplicates or repeats
A MAC address is a unique, device-identifying, alphanumeric set of __ characters specific to a piece of hardware. No two devices will ever be manufactured with the same MAC address.
12 characters
What do the first 3 sets (6 characters) of numbers represent in a MAC address?
OEM numbers
What do the last 3 sets (6 characters) of numbers represent in a MAC address?
Unique ID numbers
Routers contain two or more connections and link a __ to other devices, allowing __ between them and the __.
A) Modem, communication, internet
B) Switch, data, network
C) Hub, communication, internet
A) Modem, communication, internet
What is a routing table?
A spec sheet that the router uses to track where to send data.
Default Gateway = ???
The node in a network that serves as a forwarding host to outside networks.
True or False: a sequencing number allows proper reassembly of data.
True
True or False: an acknowledgement number is a confirmation that data has been sent.
False; an acknowledgement number is a confirmation that data has been DELIVERED.
Which protocol uses a sequencing number and acknowledgement number?
A) TCP
B) UDP
A) TCP
Provide the command-line syntax that displays all network information.
ipconfig /all
The first __ ports are reserved and are known as the “well-known ports.”
First 1024 ports
What does the acronym FCS stand for? What is the FCS’s function?
Frame Check Sequence; verifies that the frame was received in tact with all data present.
Provide all layers of the OSI model.
1) Physical
2) Data Link
3) Network
4) Transport
5) Session
6) Presentation
7) Application
Provide all layers of the TCP/IP model.
1) Network Interface
2) Internet
3) Transport
4) Application
