what does ISP stand for?
Internet service provider.
What do ISPs do?
provide third party infrastructure for your home connection.
What does Url stand for?
Uniform resource locator.
a url is made of multiple parts name one.
protocol, domain name, domain extension, folder, folder extension.
name a type of common network topology.
Star
What is a node?
A point in a network at which connections intersect
Name an advantage to star topology.
It is easy to add a new node or device, central management, data collisions are less likely, if a node fails the rest of the network is unaffected, a signal don’t need to be transmitted to all computers in the network.
Name a disadvantage of a star network topology.
If the switch fails the whole network is down, wired star networks require a lot of cabling.
Name an Advantage of mesh network topology.
If one link goes down communication between computer’s is still possible, There are multiple routes that data can take, data can be transmitted faster due to multiple connections
Name a disadvantage of mesh network topology.
exponential increase of connections as computers are added., complexity increases and devices are added
What is the role of a switch?
To allow multiple devices to communicate on one lan and to prevent data collisions.
why are ethernet cables only valid for 100m or less?
radio interference.
What does the application layer do?
It encodes/decodes the message into a form that is understandable by the sender and receiver using protocols like hypertext translation protocol.
What does the Transport layer do?
Uses tcp to break data down to packet with numbers to be reassembled at destination, this also allows for recipient to know when missing packers are present.
What does the network/Internet layer do?
Adds sender & recipient ip address so it knows where to take it.
What does the Link layer do?
Enables physical transfer of packets between nodes and between networks.
What’s the point of having network layers?
to allow for updates without needing to update everything , e.g not needing a new phone when gmail updates
What is the FDE cycle?
Fetch, Decode, Execute
What is the Role of the ALU?
Carry out arithmetic and logic
What is the Role of the Memory Address Register(MAR)?
To Contain What address to go to.
What is the Role of the Memory Data Register(MDR)?
To store to data/instructions found in the RAM
What is the Role of the Program Counter(PC)
To increment and tell cpu what register to get data/instructions from.
What is the purpose of the cpu?
To perform instructions and control the computer via the fde cycle
How does clock speed change performance?
the clock in the cpu ticks X times /second/processor core enabling to run up to X amount instructions/second/processor core
-
Paper 1 - Computer Systems2
-
About the Course3
-
1.3 Computer Networks, Connections and Protocols and Protocols42
-
n.w22
-
GeorgeF30
-
Dru <35
-
ola2
-
GeorgeM5
-
jasmine >_< (and big G)7
-
Network layers4
-
Maimie29
-
Freya3
-
Bradley's deck1
-
nicks deck1
-
zachattack2
-
hazzywazzy6
-
Justas's deck3
-
Endpoint revision6
