Chapter 7 - Virtualization and Cloud Computing

Which of the following is NOT a task that a VPN concentrator is responsible for? A VPN concentrator authenticates VPN clients. A VPN concentrator establishes tunnels for VPN connections. A VPN concentrator shuts down established connections when malicious traffic occurs. A VPN concentrator manages encryption for VPN transmissions.

A VPN concentrator shuts down established connections when malicious traffic occurs.

What type of scenario would be best served by using a Platform as a Service (PaaS) cloud model? -A group of developers needs access to multiple operating systems and the runtime libraries that the OS provides. -An organization wishes to gain access to applications through an online user interface, while maintaining compatibility across operating systems. -An organization needs to have a hosted virtual network infrastructure for their services, which are run on virtual machines. -A small organization needs to have high availability for their web server.

A group of developers needs access to multiple operating systems and the runtime libraries that the OS provides.

The PPP headers and trailers used to create a PPP frame that encapsulates Network layer packets vary between 8 and 10 bytes in size due to what field? priority FCS FEC encryption

FCS

A Type 2 hypervisor installs on a computer before any OS, and is therefore called a bare-metal hypervisor. True False

False

After L2TP establishing a VPN tunnel, GRE is used to transmit L2TP data frames through the tunnel. True False

False

FTPS (FTP Security or FTP Secure) and SFTP (Secure FTP) are two names for the same protocol. True False

False

The HTTPS (HTTP Secure) protocol utilizes the same TCP port as HTTP, port 80. True False

False

Digital certificates are issued, maintained, and validated by an organization called a certificate authority (CA). True False

True

Office 365 is an example of an SaaS implementation with a subscription model. True False

True

PPP can support several types of Network layer protocols that might use the connection. True False

True

The Virtual Network Computing (VNC) application uses the cross-platform remote frame buffer (RFB) protocol. True False

True

VMware Player and Linux KVM are both examples of what type of hypervisor? Type 1 hypervisor Type 2 hypervisor barebones hypervisor bare-metal hypervisor

Type 2 hypervisor

Regarding VNC (Virtual Network Computing or Virtual Network Connection), what statement is accurate? VNC is faster than Remote Desktop, and requires less network bandwidth. VNC is open source, allowing companies to develop their own software based on VNC. VNC uses the Remote Desktop Protocol (RDP). VNC is a standard developed by Microsoft and used by Windows Remote Desktop.

VNC is open source, allowing companies to develop their own software based on VNC.

When using a site-to-site VPN, what type of device sits at the edge of the LAN and establishes the connection between sites? VPN proxy VPN server VPN transport VPN gateway

VPN gateway

The combination of a public key and a private key are known by what term below? key set key team key pair key tie

key pair

What term is used to describe a space that is rented at a data center facility by a service provider? point of presence (PoP) service location (SL) central service point (CSP) locally exchanged data point (ledp)

point of presence (PoP)

The use of certificate authorities to associate public keys with certain users is known by what term? public-key organization certified infrastructure public-key infrastructure symmetric identification

public-key infrastructure

In order to generate a public and private key for use with SSH, what command line utility should you use? ssh-keygen key-generate ssh-newkey gpg --ssh

ssh-keygen

Amazon and Rackspace both utilize what virtualization software below to create their cloud environments? VMware vSphere Oracle VirtualBox Parallels Citrix Xen

Citrix Xen

Which of the following virtualization products is an example of a bare-metal hypervisor? Citrix XenServer VirtualBox VMware Player Linux KVM

Citrix XenServer

What special enterprise VPN supported by Cisco devices creates VPN tunnels between branch locations as needed rather than requiring constant, static tunnels? Dynamic Multipoint VPN Dynamic SmartVPN Symmetric VPN Autodial Auto Switched VPN Service

Dynamic Multipoint VPN

Which statement regarding the IKEv2 tunneling protocol is accurate? IKEv2 is an older, Layer 2 protocol developed by Microsoft that encapsulates VPN data frames. IKEv2 is based on technology developed by Cisco and standardized by the IETF. IKEv2 is an open-source VPN protocol that utilizes OpenSSL for encryption. IKEv2 offers fast throughput and good stability when moving between wireless hotspots.

IKEv2 offers fast throughput and good stability when moving between wireless hotspots.

What security encryption protocol requires regular re-establishment of a connection and can be used with any type of TCP/IP transmission? L2TP TLS IPsec SSL

IPsec

Which type of cloud service model involves hardware services that are provided virtually, including network infrastructure devices such as virtual servers? IaaS PaaS SaaS XaaS

IaaS

When using public and private keys to connect to an SSH server from a Linux device, where must your public key be placed before you can connect? -In an authorization file under your home directory on your computer. -In an authorization file on the host where the SSH server is. -In the /etc/ssh/keys folder. -In the /var/run/ssh/public folder.

In an authorization file under your home directory on your computer.

Why is the telnet utility a poor choice for remote access to a device? It provides no mechanism for authentication. It does not allow for control of a computer remotely. It cannot be used over a public WAN connection. It provides poor authentication and no encryption.

It provides poor authentication and no encryption.

A vSwitch (virtual switch) or bridge is a logically defined device that operates at what layer of the OSI model? Layer 1 Layer 2 Layer 4 Layer 7

Layer 2

By default, what network connection type is selected when creating a VM in VMware, VirtualBox, or KVM? host-only mode bridged mode NAT mode lockdown mode

NAT mode

At what layer of the OSI model does the IPsec encryption protocol operate? Physical layer Network layer Transport layer Application layer

Network layer

What open-source VPN protocol utilizes OpenSSL for encryption and has the ability to possibly cross firewalls where IPsec might be blocked? Layer 2 Tunneling Protocol (L2TP) Point-to-Point Tunneling Protocol (PPTP) Generic Routing Encapsulation (GRE) OpenVPN

OpenVPN

Which of the following statements regarding the Point-to-Point (PPP) protocol is NOT accurate? PPP can negotiate and establish a connection between two endpoints. PPP can utilize an authentication protocol, such as MS-CHAPv2 or EAP to authenticate a client. PPP can support several Network layer protocols, such as IP, that might use the connection. PPP can support strong encryption, such as AH or ESP.

PPP can support strong encryption, such as AH or ESP.

In a software defined network, what is responsible for controlling the flow of data? flow director vRouter SDN controller SDN switch

SDN controller

What statement regarding the SSH (Secure Shell) collection of protocols is accurate? SSH provides a graphical view of the remote computer. SSH does not protect against DNS spoofing. SSH does not protect against IP spoofing. SSH supports port forwarding.

SSH supports port forwarding.

What cloud service model involves providing applications through an online user interface, providing for compatibility with a multitude of different operating systems and devices? IaaS SaaS XaaS PaaS

SaaS

Which statement regarding the use of a bridged mode vNIC is accurate? The vNIC will its own IP address on the physical LAN. The vNIC will be assigned a NAT-ed IP address. The vNIC will only be able to communicate across the bridge to the host PC. The vNIC will utilize the host PC's IP address.

The vNIC will its own IP address on the physical LAN.

Which file transfer protocol has no authentication or security for transferring files, uses UDP, and requires very little memory to use? File Transfer Protocol (FTP) FTP Secure (FTPS) Secure FTP (SFTP) Trivial FTP (TFTP)

Trivial FTP (TFTP)

A community cloud is a service shared between multiple organizations, but not available publicly. True False

True

An enterprise-wide VPN can include elements of both the client-to-site and site-to-site models. True False

True

What is NOT a potential disadvantage of utilizing virtualization? -Multiple virtual machines contending for finite resources can compromise performance. -Increased complexity and administrative burden can result from the use of virtual machines. -Licensing costs can be high due to every instance of commercial software requiring a separate license. -Virtualization software increases the complexity of backups, making creation of usable backups difficult.

Virtualization software increases the complexity of backups, making creation of usable backups difficult.

When is it appropriate to utilize the NAT network connection type? Only when the VM requires an IP address on the physical LAN. Whenever the VM does not need to be access at a known address by other network nodes. Only if the VM does not need to communicate with the host PC. Only if the VM is intended for VM-to-host communications.

Whenever the VM does not need to be access at a known address by other network nodes.