R&S2 Chapter 1 Exam
What information is added to the switch table from incoming frames?
source MAC address and incoming port number
ABC, Inc. has about fifty hosts in one LAN. The administrator would like to increase the throughput of that LAN. Which device will increase the number of collision domains and thereby increase the throughput of the LAN?
switch
What does the term "port density" represent for an Ethernet switch?
the number of available ports
Consider that the main power has just been restored. PC1 (Fa0/2) asks the DHCP server for IPv4 addressing. The DHCP server sends it an IPv4 address. While PC2 (Fa0/3) is still booting up, PC3 (Fa0/4) issues a broadcast IPv4 DHCP request. DHCP Server - Fa0/1. To which port will SW1 forward this request?
to Fa0/1, Fa0/2, and F0/3 only
What are characteristics of the cut-through switching method?
- appropriate for high performance computing applications - forwarding process can begin after receiving the destination address - may forward invalid frames
A network designer must provide a rational to a customer for a design which will move an enterprise from a flat network topology to a hierarchical network topology. Which two features of the hierarchical design make it the better choice?
- easier to provide redundant links to ensure higher availability - simpler deployment for additional switch equipment
What are characteristics of the store-and-forward switching method?
- error checking before forwarding - forwarding process only begins after receiving the entire frame - only forwards valid frames
What are two advantages of modular switches over fixed-configuration switches?
- increased scalability - need for fewer power outlets
Which switch form factor should be used when large port density, fault tolerance, and low price are important factors?
- stackable switch
What are two reasons a network administrator would segment a network with a Layer 2 switch?
- to enhance user bandwidth - to isolate traffic between segments
An administrator purchases new Cisco switches that have a feature called StackPower. What is the purpose of this feature?
It enables the sharing of power among multiple stackable switches.
How is a frame from PC-A forwarded to PC-C if the MAC address table on switch SW1 is empty?
SW1 floods the frame on all ports on SW1, excluding the port through which the frame entered the switch.
What is a collapsed core in a network design?
a combination of the functionality of the distribution and core layers
What is a basic function of the Cisco Borderless Architecture distribution layer?
aggregating Layer 3 routing boundaries
Which type of transmission does a switch use when the destination MAC address is not contained in the MAC table?
broadcast
A ________ network is one that uses the same infrastructure to carry voice, data, and video signals.
converged
What is one function of a Layer 2 switch?
determines which interface is used to forward a frame based on the destination MAC address
What is one advantage of using the cut-through switching method instead of the store-and-forward switching method?
has a lower latency appropriate for high-performance computing applications
What is a basic function of the Cisco Borderless Architecture access layer?
provides access to the user
