Mastering Collision Detection in LAN Design

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Which VLAN tagging protocol is Cisco proprietary?

NIC
Trunking
802.1q
ISL (correct)

What is the length of the tag added by the switch to a frame?

8 bytes
16 bytes
2 bytes
4 bytes (correct)

Where do VLANs exist?

Only on routers
Both on routers and switches
Only on switches (correct)
Neither on routers nor switches

What is the default VLAN used for?

Frames without VLAN information (B) Signup and view all the answers

Which trunking protocol is an IEEE specification?

802.1q (C) Signup and view all the answers

Which trunking method is supported on some routers?

Trunking (D) Signup and view all the answers

Which layer of the OSI model does a bridge operate at?

Data link layer (A) Signup and view all the answers

What is the purpose of a bridge in a network?

To connect two different segments together (D) Signup and view all the answers

How does a bridge learn the location of sender hosts?

By recording sender/location pairs in the bridge table (C) Signup and view all the answers

What does a bridge do if the destination address is on the same segment as the source address?

Filters the frame (D) Signup and view all the answers

What is the main difference between a bridge and a switch?

A switch has more ports than a bridge (D) Signup and view all the answers

What technology makes switches faster than bridges?

Cut-through forwarding (B) Signup and view all the answers

Which layer of the OSI model is responsible for defining special sequences to indicate the beginning and end of each frame?

Data Link layer (B) Signup and view all the answers

Which layer of the OSI model assigns addresses to stations to allow for effective use of the media?

Data Link layer (A) Signup and view all the answers

Which layer of the OSI model defines how stations will share connections with other systems connected to the network?

Data Link layer (D) Signup and view all the answers

What is the purpose of the preamble in the Ethernet frame format?

To provide clock synchronization (C) Signup and view all the answers

What is the main difference between the original Ethernet and Fast Ethernet?

Fast Ethernet operates at 10 times the speed of original Ethernet (D) Signup and view all the answers

What is the purpose of repeaters in a network?

To amplify and regenerate signals (B) Signup and view all the answers

Which of the following is a function of a bridge?

All of the above (D) Signup and view all the answers

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 (D) Signup and view all the answers

What is the purpose of fragment-free switching?

To avoid forwarding Ethernet frames smaller than 64 bytes (A) Signup and view all the answers

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 (B) Signup and view all the answers

What is a VLAN?

A separate broadcast domain in a computer network (B) Signup and view all the answers

What is required for inter VLAN communication?

A Layer three device (router) (A) Signup and view all the answers

Which two flavors does 6 GIGABIT ETHERNET come in?

1000Base-T and 1000Base-X (A) Signup and view all the answers

What does 1000Base-T Ethernet do to each byte in the MAC frame before encoding?

Scrambles each byte to randomize the bit sequence (A) Signup and view all the answers

Which operation modes does 1000Base-T support?

Both half-duplex and full-duplex (A) Signup and view all the answers

What is the purpose of Auto-Negotiation in Ethernet?

To negotiate speed, duplex mode, and flow control support (A) Signup and view all the answers

What happens if devices do not support Auto-Negotiation?