Network+ ch 7 – Cloud Computing and Remote Access – Flashcards
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"What protocol below only provides the framework for authenticating clients and servers, but relies on other encryption and authentication schemes to verify the credentials of clients or servers?"
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EAP
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What two different types of encryption can be used by IPsec during data transfer?
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Encapsulating Security Payload (ESP) Authentication Header (AH)
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What cloud service model involves providing applications through an online user interface, providing for compatibility with a multitude of different operating systems and devices?
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SaaS
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The SSH service listens on what TCP port?
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22
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What protocol below is a Microsoft proprietary protocol first available in Windows Vista?
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SSTP
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How often should administrators and network users be required to change their password?
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60 days
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What two key lengths are the most popular for the SHA-2 hashing algorithm?
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256, 512
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The MD5 hashing algorithm is not susceptible to the possibility of hash collisions.
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False
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What encryption protocol was designed as more of an integrity check for WEP transmissions rather than a sophisticated encryption protocol?
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TKIP
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After L2TP establishing a VPN tunnel, GRE is used to transmit L2TP data frames through the tunnel.
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False
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PPP can support several types of Network layer protocols that might use the connection.
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True
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A SecurID key chain fob from RSA security generates a password that changes how often?
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every 60 seconds
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An enterprise-wide VPN can include elements of both the client-to-site and site-to-site models.
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True
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Which type of cloud service model involves hardware services that are provided virtually, including network infrastructure devices such as virtual servers?
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IaaS
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The key management phase of IPsec is reliant on which two services below?
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Internet Security Association and Key Management Protocol (ISAKMP), Internet Key Exchange (IKE)
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What authentication protocol sends authentication information in cleartext without encryption?
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PAP
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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?
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FCS
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Windows, UNIX, Linux, and Mac OS clients are all capable of connecting to a VPN using PPTP.
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True
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Digital certificates are issued by organizations known as what term?
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certification authorities
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The combination of a public key and a private key are known by what term below?
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key pair
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Which of the following is NOT an encryption algorithm used by SSH?
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SHA-2
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What two options below are AAA services?
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TACACS+ RADIUS
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When using public and private keys to connect to an SSH server, where must your public key be placed before you can connect?
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In an authorization file on the host where the SSH server is.
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The original version of the Secure Hashing Algorithm (SHA) was developed by the NSA, and used a hash of what length?
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160 bit
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What security encryption protocol requires regular re-establishment of a connection and can be used with any type of TCP/IP transmission?
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IPsec
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Amazon and Rackspace both utilize what virtualization software below to create their cloud environments?
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Citrix Xen
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What security principle provides proof of delivery and proof of the sender's identity?
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non-repudiation
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At what layer of the OSI model does the IPsec encryption protocol operate?
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Network layer
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What two protocols below are Data Link Layer protocols designed to connect WAN endpoints in a direct connection, such as when a client computer connects to a server at an ISP using a dial-up or DSL connection and modem?
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SLIP, PPP
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When using a site-to-site VPN, what type of device sits at the edge of the LAN and establishes the connection between sites?
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VPN gateway
