30 Questions
What is the primary function of a bridge in a network?
To filter and forward frames based on their destination addresses
How does a bridge learn the location of network nodes?
By recording the source address and incoming interface when receiving frames
What happens when a bridge receives a frame for a destination it doesn't have in its filtering table?
The bridge forwards the frame to all connected interfaces
What is the main limitation of using bridges in a network?
Bridges can become a bottleneck when there is too much traffic between network segments
What is the purpose of the filtering table maintained by a bridge?
To determine which interfaces to forward frames to based on the destination address
How does a bridge handle a frame sent from node C to node D, when it has no information about D in its filtering table?
The bridge forwards the frame to all interfaces except the one it was received on
What layer of the OSI model do bridges work at?
Data Link Layer
What is the main advantage of using bridges?
Isolation of collision domains
How do bridges filter packets?
By examining only the frame header
What happens if the destination address is in the same segment as the source address?
The bridge stops transmitting the frame
Why can't bridges filter packets according to their protocols?
Inability to interpret higher-level information
What technology does a bridge use to access and transmit frames on a segment?
CSMA/CD (Carrier Sense Multiple Access with Collision Detection)
What is the primary function of a hub in a computer network?
To connect multiple devices and broadcast data to all ports
Why might a repeater be used in a network?
To regenerate and amplify weakened signals over long cable lengths
What is a key disadvantage of using a hub compared to other internetworking devices?
Hubs do not isolate collision domains across network segments
Which statement about hubs is not true?
Hubs can connect network segments with different access methods
What is a key advantage of using a hub over other internetworking devices?
Hubs provide an economical way to expand and connect networks
Which layer of the OSI model do hubs and repeaters operate at?
Physical layer
Which of the following is a limitation of switches when handling heavy traffic?
All of the above
In the cut-through switching mode, which of the following statements is true?
It reads the first 14 bytes of each packet and then transmits it
What is the primary advantage of the store-and-forward switching mode?
It can detect and prevent the propagation of corrupt packets
Which of the following statements about routers is correct?
Routers are used to pass data packets between networks based on network protocol information
Which statement best describes the function of video conferencing in the context of the given information?
The given information does not provide any details about video conferencing
What is the purpose of the Frame Check Sequence (FCS) mentioned in the context of switching modes?
To detect and prevent the propagation of corrupt packets
What is the primary function of a modem?
To modulate digital signals into analog signals for transmission over telephone lines
Which of the following is NOT a typical I/O interface found in modems?
Ethernet interface
What is the difference between baud rate and bits per second (bps) in modem performance?
Baud rate measures the number of signal changes per second, while bps measures the number of bits transmitted per second
Why is the theoretical maximum speed of 56 kbps for V.90 modems not achievable in practice?
The actual data link is 64 kbps, and some overhead data is required for communication
What is the key difference between asynchronous and synchronous modems?
Asynchronous modems have no clocking devices, while synchronous modems have clocking devices
What is the purpose of modulating a digital signal into an analog signal in a modem?
To enable the digital signal to be transmitted over telephone lines
Learn about internetworking devices, products used to connect computer networks as they grow in size and complexity. Explore hubs, which are common internetworking devices acting as multi-port repeaters at the center of star topology networks.
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