CCN 2: Ch: 1 Introduction to Switched Networks Flashcards
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
A network designer must provide a rationale to a customer for a design which will move an enterprise from a flat network topology to a hierarchical network topology. Which two [2] features of the hierarchical design make it the better choice?
- simpler deployment for additional switch equipment
2. easier to provide redundant links to ensure higher availability
What are two [2] advantages of modular switches over fixed-configuration switches?
- need for fewer power outlets
2. increased scalability
PICTURE: Consider that the main power has just been restored. PC1 asks the DHCP server for IPv4 addressing. The DHCP server sends it an IPv4 address. While PC2 is still booting up, PC3 issues a broadcast IPv4 DHCP request. To which port will SW1 forward this request?
to Fa0/1, Fa0/2, and Fa0/3 only
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 a collapsed core in a network design?
a combination of the functionality of the distribution and core layers
What are two [2] reasons a network administrator would segment a network with a Layer 2 switch?
- to enhance user bandwidth
2. to isolate traffic between segments
How is a frame sent from PCA forwarded to PCC 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 an “ appropriate for high performance computing applications”
Cut-Through
What is a “forwarding process can begin after receiving the destination address”
Cut-Through
What “may forward invalid frames”
Cut-Through
an “error checking before forwarding”
store and forward
A “forwarding process only begin after receiving the entire frame”
store and forward
only forward valid frames
store and forward
What is a basic function of the Cisco Borderless Architecture distribution layer?
aggregating Layer 3 routing boundaries
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
Which type of transmission does a switch use when the destination MAC address is not contained in the MAC address table?
broadcast
What is a basic function of the Cisco Borderless Architecture access layer?
provides access to the user
What information is added to the switch table from incoming frames?
source MAC address and incoming port number
A ___ network is one that uses the same infrastructure to carry voice, data, and video signals.
converged
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.
Which switch form factor should be used when large port density, fault tolerance, and low price are important factors?
stackable switch
