IS 404 -- MIDTERM 1 QUESTIONS AND CORRECT DETAILED
ANSWERS (VERIFIED ANSWERS) |ALREADY GRADED
A+||BRAND NEW!!
What are the elements of the data communication systems? Ans✓✓✓1.
Message
2. Sender
3. Receiver
4. Medium/communication channel
5. Protocol
Amplifiers Ans✓✓✓A device that increases the POWER of a signal
Amplifies signal AND noise
Layer 1 device
Repeater Ans✓✓✓Receives a signal and repeats it
Even retransmits collisions
Ports on a repeater not have a MAC address
Layer 1 device
,Hub Ans✓✓✓A device that connects the multiple hosts/segments of the
LAN
Broadcasts everything that it receives to all connected devices (multi-
port repeater)
When it receives a message, it sounds out to ALL ports and does not
break collision domains
Layer 1 device
Bridge Ans✓✓✓Used to combine Ethernet segments and provide
intelligent frame transmission by filtering, flooding, or forwarding
frames
Collisions are NOT forwarded
Layer 1 device
Switch Ans✓✓✓Like a hub, but it only forwards packets to the intended
destination
Only send to the port that is associated with the destination MAC
address
,Tracks MAC address
Breaks collision domains
Layer 2
Collisions Ans✓✓✓When two devices try to access the network at the
same time. More of these occur when network traffic increases.
The network detects the "collision" of the two transmitted packets and
discards them both
Any computer on the same network segment can cause a collision
Router Ans✓✓✓A device that forwards packets between networks,
connects different subnets
How the internet works (routing tables) except it doesn't broadcast all
incoming signals
Breaks broadcast and collision domains
Sends packets that are destined for locations outside of the LAN to the
Gateway Address
, Interconnects INDEPENDENT networks
Provides functions without requiring modifications of the networking
architecture of any of the attached networks
Layer 3
Collision domains Ans✓✓✓A group of computers that can collide with
each other
Part of a network where packet collisions can occur
Anything connected to a hub is a collision domain
Anything coming out of a switch is a collision domain
MAC Addresses: Format Ans✓✓✓Hexidecimal
MM:MM:MM:SS:SS:SS format
A globally unique identifier assigned to network devices
Often referred to as hardware or physical address
ANSWERS (VERIFIED ANSWERS) |ALREADY GRADED
A+||BRAND NEW!!
What are the elements of the data communication systems? Ans✓✓✓1.
Message
2. Sender
3. Receiver
4. Medium/communication channel
5. Protocol
Amplifiers Ans✓✓✓A device that increases the POWER of a signal
Amplifies signal AND noise
Layer 1 device
Repeater Ans✓✓✓Receives a signal and repeats it
Even retransmits collisions
Ports on a repeater not have a MAC address
Layer 1 device
,Hub Ans✓✓✓A device that connects the multiple hosts/segments of the
LAN
Broadcasts everything that it receives to all connected devices (multi-
port repeater)
When it receives a message, it sounds out to ALL ports and does not
break collision domains
Layer 1 device
Bridge Ans✓✓✓Used to combine Ethernet segments and provide
intelligent frame transmission by filtering, flooding, or forwarding
frames
Collisions are NOT forwarded
Layer 1 device
Switch Ans✓✓✓Like a hub, but it only forwards packets to the intended
destination
Only send to the port that is associated with the destination MAC
address
,Tracks MAC address
Breaks collision domains
Layer 2
Collisions Ans✓✓✓When two devices try to access the network at the
same time. More of these occur when network traffic increases.
The network detects the "collision" of the two transmitted packets and
discards them both
Any computer on the same network segment can cause a collision
Router Ans✓✓✓A device that forwards packets between networks,
connects different subnets
How the internet works (routing tables) except it doesn't broadcast all
incoming signals
Breaks broadcast and collision domains
Sends packets that are destined for locations outside of the LAN to the
Gateway Address
, Interconnects INDEPENDENT networks
Provides functions without requiring modifications of the networking
architecture of any of the attached networks
Layer 3
Collision domains Ans✓✓✓A group of computers that can collide with
each other
Part of a network where packet collisions can occur
Anything connected to a hub is a collision domain
Anything coming out of a switch is a collision domain
MAC Addresses: Format Ans✓✓✓Hexidecimal
MM:MM:MM:SS:SS:SS format
A globally unique identifier assigned to network devices
Often referred to as hardware or physical address
