Chapter 5

Which statement is true about MAC addresses?

• The ISO is responsible for MAC addresses regulations.
• The first three bytes are used by the vendor assigned OUI.

 What is a characteristic of a contention-based access method?

• It is a nondeterministic method.
• It scales very well under heavy media use.

Which statement describe features or functions of the logical link control sublayer in Ethernet standards? 

• Logical link control is implemented in software.
• Logical link control is specified in the IEEE 802.3 standard.

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

• is used as a padding for data
• is used for timing synchronization

What is the Layer 2 multicast MAC address that corresponds to the Layer 3 IPv4 multicast address 224.139.34.56?

• 01-00-5E-0B-22-38
• FE-80-00-0B-22-38

 A host is trying to send a packet to a device on a remote LAN segment, but there are currently no mappings in its ARP cache. How will the device obtain a destination MAC address?

• It will send an ARP request for the MAC address of the default gateway.
• It will send an ARP request for the MAC address of the destination device.

A Layer 2 switch is used to switch incoming frames from a 1000BASE-T port to a port connected to a 100Base-T network. Which method of memory buffering would work best for this task?

• port-based buffering
• shared memory buffering

When would a switch record multiple entries for a single switch port in its MAC address table?

• when another switch is connected to the switch port
• when the switch is configured for Layer 3 switching

How does adding an Ethernet line card affect the form factor of a switch?

• by expanding the port density
• by making the switch stackable

 A network administrator issues the following commands on a Layer 3 switch:DLS1(config)# interface f0/3DLS1(config-if)# no switchportDLS1(config-if)# ip address 172.16.0.1 255.255.255.0DLS1(config-if)# no shutdownDLS1(config-if)# endWhat is the administrator configuring?

• a Cisco Express Forwarding instance
• a routed port