Ch 4 quiz

Which statement is true about broadcast and collision domains? Adding a router to a network will increase the size of the collision domain. The size of the collision domain can be reduced by adding hubs to a network. The more interfaces a router has the larger the resulting broadcast domain. Adding a switch to a network will increase the size of the broadcast domain. Refer to curriculum topic: 4.2.2

Adding a switch to a network will increase the size of the broadcast domain. A switch that receives a broadcast frame will forward the frame out all other interfaces, including interfaces that connect to other switches. These switches will also perform the same forwarding action. By adding more switches to the network, the of the broadcast domain increases.

What are the three layers of the switch hierarchical design model? (Choose three.) access data link core network access enterprise distribution Refer to curriculum topic: 4.1.1

access core distribution The access layer is the lowest layer and it provides network access to users. The distribution layer has many functions, but it aggregates data from the access layer, provides filtering, policy control, and sets Layer 3 routing boundaries. The core layer provides high speed connectivity.

Which cost-effective physical network topology design is recommended when building a three-tier campus network that connects three buildings?​ bus mesh extended star dual ring Refer to curriculum topic: 4.1.1

extended star For efficiency, scalability, and cost-effectiveness, building an extended star topology from a centralized site to all other campus sites is recommended. A mesh topology is much more expensive, and bus and dual ring topologies are more difficult to troubleshoot and maintain.

When the appropriate switch form factor for a network is being determined, what type of switch should be selected when future expansion is important and cost is not a limiting factor? stackable switch 1 rack unit switch fixed configuration switch modular switch Refer to curriculum topic: 4.1.2

modular switch A modular switch provides fault tolerance and features for bandwidth availability and future expansion by using line cards but is rather costly to implement. Stackable switches provide fault tolerance and bandwidth availability by using special cables between the switches and are less costly to implement than modular switches. A nonstackable switch does not provide these features. A fixed configuration switch is a single switch that does not support features beyond those that originally came with it.

Which option correctly describes a switching method? cut-through: makes a forwarding decision after receiving the entire frame store-and-forward: forwards the frame immediately after examining its destination MAC address cut-through: provides the flexibility to support any mix of Ethernet speeds store-and-forward: ensures that the frame is free of physical and data-link errors Refer to curriculum topic: 4.2.1

store-and-forward: ensures that the frame is free of physical and data-link errors Store-and-forward switching performs an error check on an incoming frame after receiving the entire frame on the ingress port. Switches which use this method have the flexibility to support any mix of Ethernet speeds. The cut-through method begins the forwarding process after the destination MAC address of an incoming frame is looked up and the egress port has been determined.

When would a network designer be concerned with RUs? when considering port density when calculating maximum port speed when determining the number of available line cards when purchasing a specific number of switches for a network rack Refer to curriculum topic: 4.1.2

when purchasing a specific number of switches for a network rack A rack unit or RU is a specific measurement related to the height of the switch. A switch with a 1 RU rating is smaller than a 2 RU switch. Port density measures the number of ports on a switch. Modularity influences the number of available line cards. Port speed measures the number of bits per second that can flow through a given port.

Which impact does adding a Layer 2 switch have on a network? an increase in the number of dropped frames an increase in the size of the broadcast domain an increase in the number of network collisions an increase in the size of the collision domain Refer to curriculum topic: 4.2.2

an increase in the size of the broadcast domain Adding a Layer 2 switch to a network increases the number of collision domains and increases the size of the broadcast domain. Layer 2 switches do not decrease the amount of broadcast traffic, do not increase the amount of network collisions and do not increase the number of dropped frames.

Which service is provided by an automated attendant feature on a converged network? point-to-point video call routing IT management interface video conferencing Refer to curriculum topic: 4.1.1

call routing The automated attendant feature increases the speed of voice services by routing calls directly to individuals or departments. Point-to-point video and video conferencing describe video services on a converged network. An IT management interface is part of a converged network solution that allows IT personnel to facilitate moves, adds, and changes through a centralized application.

Which switching method describes a switch that transfers a frame as soon as the destination MAC address is read? fragment-free cut-through store-and-forward latency forwarding

cut-through

Which function is supplied by the access layer in a three-layer network design? high-speed connectivity routing application of policies network access backbone connectivity Refer to curriculum topic: 4.1.1

network access The main purpose of devices in the access layer is to supply network access to end users. Distribution layer devices provide services such as routing and policy functions. The core layer provides high-speed backbone connectivity.

When an appropriate switch form factor for a network is being determined, what should be selected when fault tolerance and bandwidth availability are desired but the budget is limited? stackable switch non-stackable switch fixed configuration switch modular switch Refer to curriculum topic: 4.1.2

stackable switch Stackable switches provide fault tolerance and bandwidth availability by using special cables between switches and are less costly to implement than modular switches. A non-stackable switch does not provide these features. A fixed configuration switch is a single switch that does not support features beyond those that originally came with it. A modular switch usually provides fault tolerance and features for bandwidth availability but is rather costly to implement.

Which two characteristics describe a converged network? (Choose two.) decreased service calls support of voice and video both using the same switch separate wiring infrastructure for voice and video traffic affordability for small and medium businesses cheaper equipment cost Refer to curriculum topic: 4.1.1

support of voice and video both using the same switch affordability for small and medium businesses Converged networks have traditional user traffic as well as digitized voice and video traffic that once required separate networks. Now, instead of separate groups managing separate networks, one group of personnel can manage the network.