Network+ Guide to Networks 7 Edition, Chapter
10 Network Segmentation and Virtualization -
Review Questions
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A CIDR block of /26 is equivalent to what subnet mask below? - ✔✔255.255.255.192
A network with 6 bits remaining for the host portion will have how many usable host addresses? -
✔✔62
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A network with the subnet mask 255.255.255.0 would have what CIDR block? - ✔✔/24
A single switch can manage traffic belonging to several VLANs on a single interface, by configuring
which option on the interface? - ✔✔A trunk port
An attacker configures a VLAN frame with two tags instead of just one. The first tag directs the frame
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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? - ✔✔VLAN hopping attack
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How does a vNIC get a MAC address? - ✔✔Upon creation, each vNIC is automatically assigned a
MAC address
How can VLAN hopping attacks be prevented on a network? - ✔✔Disable auto trunking and move
native VLANs to unused VLANs.
How many bits of a Class A IP address are used for host information? - ✔✔24 bits (p492)
In an IPv6 address, the first 64 bits of the address are known as what? - ✔✔routing prefix
In order to allow communication between VLANs for exchange of data, what must be used? - ✔✔a
router
STP selects the root bridge based on which parameter? - ✔✔Bridge ID (BID)
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? - ✔✔2^h-2 255.255.254.0/23 115.100.10.0/23 Number of biTs class A will use is 24.
, Use formula. CIDR notation for supernet's network ID: 115.100.10.0/23 Supernet mask for supernet in
binary: 11111111.11111111.11111100.00000000 or 255.255.254.0/23 in decimal
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? - ✔✔2^h-2 255.255.255.128/25
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120.10.10.1/26
Telnet and SSH are called _____ systems because they use the existing network and its protocols to
interface with the switch. - ✔✔in-band management (p530)
Telnet and SSH are known as what type of management system? - ✔✔in-band (p530)
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The first iteration of STP was defined in what IEEE standard below? - ✔✔802.1d
The management option that can provide on-site infrastructure access when the network is down or
complete remote access in cases of connectivity failures on the network, such as via a cellular signal,
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is known as? - ✔✔out-of-band management
The Shortest Path Bridging protocol is defined in what IEEE standard? - ✔✔802.1aq
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What are four advantages to using virtualization on a network? - ✔✔1. Efficient use of resources 2.
Cost and energy savings
3. Fault and threat isolation 4. Simple backups, recovery, and replication
What is the formula for determining the number of possible hosts on a network? - ✔✔2^ h - 2 = Z (or
2h - 2 = Z) (p498)
What (is the) IEEE standard that specifies how VLAN information appears in frames and how
switches interpret that information? - ✔✔802.1Q
What is the software that allows you to define VM's and manage resource allocation and sharing
among them? - ✔✔Hypervisor (p507, also known as virtual machine manager)
What is the network ID with CIDR notation for the IP address 172.16.32.108 with the subnet mask
255.255.255.0? - ✔✔172.16.32.0/24
(Mask:/24 Hosts:256 Usable:254 Netmask:255.255.255.0 Hex Mask:ff ff ff 00 and this is a Class C
net) IP in binary 10101100.00010000.00100000.01101100
SubneT mask 11111111.11111111.11111111.00000000 (p500)
ANDing 10101100.00010000.00100000.00000000 (p505) NeTwork ID 172.16.32.0
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