CCNA Routing and Switching Essentials Chapter 1

Refer to the image. How many collision domains are there?

12

Refer to the image. How many broadcast domains are there?

5

What is one advantage of using the cut-through switching method instead of the store-and-forward switching method? A. has a lower latency appropriate for high-performance computing applications​ B. provides the flexibility to support any mix of Ethernet speeds C. makes a fast forwarding decision based on the source MAC address of the frame D. has a positive impact on bandwidth by dropping most of the invalid frames

A. has a lower latency appropriate for high-performance computing applications​

Which switch form factor should be used when large port density, fault tolerance, and low price are important factors? A. stackable switch B. rackable 1U switch C. fixed-configuration switch D. modular switch

A. stackable switch

Refer to the exhibit. 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?​ A. to Fa0/1, Fa0/2, and Fa0/3 only B. to Fa0/1, Fa0/2, Fa0/3, and Fa0/4 C. to Fa0/1, Fa0/2, and Fa0/4 only​ D. to Fa0/1 and Fa0/2 only E. to Fa0/1 only​

A. to Fa0/1, Fa0/2, and Fa0/3 only

An administrator purchases new Cisco switches that have a feature called StackPower. What is the purpose of this feature? A. It enables AC power for a switch to be provided from a powered patch panel. B. It enables the sharing of power among multiple stackable switches. C. It enables many switches to be connected to increase port density. D. It enables many switches to be physically stacked in an equipment rack. E. It enables many switches to be connected with a special fiber-optic power cable to provide higher bandwidth.

B. It enables the sharing of power among multiple stackable switches.

What is one function of a Layer 2 switch? A. forwards data based on logical addressing B. determines which interface is used to forward a frame based on the destination MAC address C. duplicates the electrical signal of each frame to every port D. learns the port assigned to a host by examining the destination MAC address

B. determines which interface is used to forward a frame based on the destination MAC address

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 features of the hierarchical design make it the better choice? (Choose two.) A. less required equipment to provide the same performance levels B. easier to provide redundant links to ensure higher availability C. lower bandwidth requirements D. simpler deployment for additional switch equipment E. reduced cost for equipment and user training

B. easier to provide redundant links to ensure higher availability D. simpler deployment for additional switch equipment

What is a basic function of the Cisco Borderless Architecture distribution access layer layer? A. aggregating Layer 3 routing boundaries B. providing access to the user C. acting as a backbone D. aggregating all the campus blocks

B. providing access to the user

What are two reasons a network administrator would segment a network with a Layer 2 switch? (Choose two.) A. to isolate ARP request messages from the rest of the network B. to enhance user bandwidth C. to eliminate virtual circuits D. to create fewer collision domains E. to isolate traffic between segments F. to create more broadcast domains

B. to enhance user bandwidth E. to isolate traffic between segments

Refer to the exhibit. How is a frame sent from PCA forwarded to PCC if the MAC address table on switch SW1 is empty? A. SW1 floods the frame on all ports on the switch, excluding the interconnected port to switch SW2 and the port through which the frame entered the switch. B. SW1 forwards the frame directly to SW2. SW2 floods the frame to all ports connected to SW2, excluding the port through which the frame entered the switch. C. SW1 floods the frame on all ports on SW1, excluding the port through which the frame entered the switch. D. SW1 drops the frame because it does not know the destination MAC address.

C. SW1 floods the frame on all ports on SW1, excluding the port through which the frame entered the switch.

What information is added to the switch table from incoming frames? A. source IP address and incoming port number B. destination IP address and incoming port number C. source MAC address and incoming port number D. destination MAC address and incoming port number

C. source MAC address and incoming port number

What does the term "port density" represent for an Ethernet switch? A. the memory space that is allocated to each switch port B. the speed of each port C. the number of available ports D. the numbers of hosts that are connected to each switch port

C. the number of available ports

What is a collapsed core in a network design? A. a combination of the functionality of the access and distribution layers B. a combination of the functionality of the access and core layers C. a combination of the functionality of the access, distribution, and core layers D. a combination of the functionality of the distribution and core layers

D. a combination of the functionality of the distribution and core layers

What is a basic function of the Cisco Borderless Architecture access layer? A. aggregates Layer 2 broadcast domains B. provides access to the user C. provides high availability D. aggregates Layer 3 routing boundaries

D. aggregates Layer 3 routing boundaries

Which type of transmission does a switch use when the destination MAC address is not contained in the MAC address table? A. anycast B. unicast C. multicast D. broadcast

D. broadcast

What are two advantages of modular switches over fixed-configuration switches? (Choose two.) A. lower forwarding rates B. lower cost per switch C. availability of multiple ports for bandwidth aggregation D. increased scalability E. need for fewer power outlets

D. increased scalability E. need for fewer power outlets

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? A. NIC B. host C. hub D. switch

D. switch

A __________ network is one that uses the same infrastructure to carry voice, data, and video signals.

converged

Match the forwarding characteristic to its type.

cut-through: appropriate for high performance computing applications may forward invalid frames forwarding process can begin after receiving the destination address store-and-forward: error checking before forwarding only forwards valid frames forwarding process only begins after receiving the entire frame