Network Basics for Cloud Computing Quiz

What is the purpose of network virtualization?

• To improve manageability by setting up separate physical networks for different node groups

• To reduce latency by using physical networking devices

• To manually configure hardware to instantiate virtual networks

• To combine available resources in a network, divide a network into segments, or create software networks between VMs

What is the function of a default gateway in a network?

• Hardens LAN security by separately transmitting packets from different VLANs

• Provides a point of presence and entry for computers from different networks to communicate

• Receives, analyzes, and forwards data packets from the network to connected computers

• Connects the computers of one network to another and defines the boundaries of the network

What is the difference between broadcast and unicast traffic?

• Broadcast means one speaks while all others listen, while unicast is communication between two network devices

• Unicast packets are flooded across the entire broadcast domain, while broadcast packets are sent directly to the target receiver

• Broadcast is used for half-duplex communication, while unicast is used for full-duplex communication

• Broadcast consumes less bandwidth compared to unicast traffic

What is the advantage of VLANs in a network?

• Improves manageability by grouping and regrouping nodes easily

• Connects the computers of one network to another and defines the boundaries of the network

• Defines broadcast domains, hardens LAN security, and improves network robustness

• Provides a point of presence and entry for computers from different networks to communicate

How does a router function in a virtualized environment?

• Establishes intelligent communication between two different networks by routing data packets

• Connects the computers of one network to another and defines the boundaries of the network

• Receives, analyzes, and forwards data packets from the network to connected computers

• Provides a point of presence and entry for computers from different networks to communicate

What is the purpose of a network hypervisor in network virtualization?

• Creates an abstraction layer that hosts and supports different virtual networks

• Manually configures hardware to instantiate virtual networks

• Controls the resources, bandwidth, and capacity for each logical network

• Provides a simplified representation of the nodes and links making up the virtual networks

How does network virtualization improve manageability?

• Grouping and regrouping of nodes are eased, and configuration of VM is allowed from a centralized management workstation

• Reduces latency by using physical networking devices

• Enables the functional grouping of nodes in a virtual network

• Allows communication between nodes in a virtual network

What is the purpose of a VLAN in a network?

• Subdivides a physical LAN into separate logical broadcast domains

• Provides a point of presence and entry for computers from different networks to communicate

• Improves network robustness by isolating faults in one VLAN from affecting others

• Connects the computers of one network to another and defines the boundaries of the network

What is the function of a trunk link in a VLAN?

• Establishes intelligent communication between two different networks by routing data packets

• Provides a simplified representation of the nodes and links making up the virtual networks

• Connects a switch to another switch or a router and transmits tagged frames of multiple VLANs

• Connects a host to a switch and allows the host to receive or send untagged frames

What is the disadvantage of network virtualization?

• Causes performance issues if not implemented with proper planning and resources

• Improves utilization by enabling multiple VMs to share the same physical network

• Requires IT staff to be trained and experienced in handling the shift to virtual machines

• Reduces latency by using physical networking devices