Network+ Chapter 10- Network Segmentation and Virtualization (Review Questions)

Upon creation, each vNIC is automatically assigned a MAC address

How does a vNIC get a MAC address?

24 bits

How many bits of a Class A IP address are used for host information?

root bridge

Only one _____ exists on a network using STP.

Layer 3 (Network), Layer 2 (Data-Link)

Subnetting operates at Layer _____ while VLANs function at Layer ______.

/23, 255.255;254.0

Suppose you have leased two Class C licenses, 115.100.10.0 and 115.100.11.0. You want to use all these Class C IP addresses in one supernet. What is the CIDR notation for this supernet? What is its supernet mask?

/25, 255.255.255.128

Suppose your company has leased one Class C license, 120.10.10.0, and wants to sublease the first half of these IP addresses to another company. What is the CIDR notation for the subnet to be subleased? What is the subnet mask for this network?

Hypervisor

What is the software that allows you to define VMs and manage resource allocation and sharing among them?

Virtual switch

What virtual, logically defined device operates at the Data Link layer to pass frames between nodes?

Native VLANs

Which VLAN on a switch manages untagged frames?

To reduce the nmber of routing table entries by combining several entries

Which of the following is not a good reason to subnet a network?

NAT mode

With which network connection type does the VM obtain IP addressing information from its host?

in-band management

Telnet and SSH are called _____ systems because they use the existing network and its protocols to interface with the switch

Trunk port

Which port on a switch manages traffic for multiple VLANs?

VRRP

Which protocol assigns a virtual IP to a group of routers?

DHCP relay agent

While designing your network's VLAN topology, your team has decided to use a centrally managed DHCP server rather than creating a separate DHCP server for each VLAN. What software will you need?

A BPDU filter can be used to disable STP on specific ports. For example, you might use a BPDU filter on the demarc, where ISP's service connects with a business's network, to prevent the ISP's WAN topology from mixing with the corporate network's topology for the purpose of plotting STP paths.

Why is a BPDU filter needed at the demarc point?

VLAN hopping attack

An attacker configures a VLAN frame with two tags instead of just one. The first tag directs the frame to the authorized VLAN. After the frame enters the first VLAN, the switch appropriately removes the tag, then discovers the next tag, and sends the frame along to a protected VLAN, which the attacker is not authorized to access. What kind of attack is this

1. Efficient use of resources 2. Cost and energy savings 3. Fault and threat isolation 4. Simple backups, recovery, and replication

What are four advantages to using virtualization on a network?

2^(h) - 2 = Z

What is the formula for determining the number of possible hosts on a network?

172.16.32.0

What is the network ID with CIDR notation for the IP address 172.16.32.108 with the subnet mask 255.255.255.0?