30 Questions
Which VLAN tagging protocol is Cisco proprietary?
ISL
What is the length of the tag added by the switch to a frame?
4 bytes
Where do VLANs exist?
Only on switches
What is the default VLAN used for?
Frames without VLAN information
Which trunking protocol is an IEEE specification?
802.1q
Which trunking method is supported on some routers?
Trunking
Which layer of the OSI model does a bridge operate at?
Data link layer
What is the purpose of a bridge in a network?
To connect two different segments together
How does a bridge learn the location of sender hosts?
By recording sender/location pairs in the bridge table
What does a bridge do if the destination address is on the same segment as the source address?
Filters the frame
What is the main difference between a bridge and a switch?
A switch has more ports than a bridge
What technology makes switches faster than bridges?
Cut-through forwarding
Which layer of the OSI model is responsible for defining special sequences to indicate the beginning and end of each frame?
Data Link layer
Which layer of the OSI model assigns addresses to stations to allow for effective use of the media?
Data Link layer
Which layer of the OSI model defines how stations will share connections with other systems connected to the network?
Data Link layer
What is the purpose of the preamble in the Ethernet frame format?
To provide clock synchronization
What is the main difference between the original Ethernet and Fast Ethernet?
Fast Ethernet operates at 10 times the speed of original Ethernet
What is the purpose of repeaters in a network?
To amplify and regenerate signals
Which of the following is a function of a bridge?
All of the above
What happens when a bridge receives a frame with a destination MAC address that is not in its bridge table?
The frame is flooded on all interfaces except the one it arrived on
What is the purpose of fragment-free switching?
To avoid forwarding Ethernet frames smaller than 64 bytes
What is the main difference between cut-through switching and store and forward switching?
Store and forward switching starts to forward the frame as soon as it reads the destination MAC address
What is a VLAN?
A separate broadcast domain in a computer network
What is required for inter VLAN communication?
A Layer three device (router)
Which two flavors does 6 GIGABIT ETHERNET come in?
1000Base-T and 1000Base-X
What does 1000Base-T Ethernet do to each byte in the MAC frame before encoding?
Scrambles each byte to randomize the bit sequence
Which operation modes does 1000Base-T support?
Both half-duplex and full-duplex
What is the purpose of Auto-Negotiation in Ethernet?
To negotiate speed, duplex mode, and flow control support
What happens if devices do not support Auto-Negotiation?
All of the above
How can a DIX Ethernet II frame and an IEEE 802.3 frame be distinguished?
By looking at the value in the 'Length' field
Quiz: Understanding Collision Detection in Local Area Network Design Test your knowledge on collision detection in local area network (LAN) design. Learn about the different methods used for collision detection depending on the transmission medium, such as coaxial cable. Explore how collision detection helps in preventing data collisions during transmission.
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