Network security

1. What is a Virtual Private Network (VPN)?

		a)	a non-public (computer) network built within a public network infrastructure
		b)	a public (computer) network built within a public network infrastructure
		c)	a public (computer) network built into a non-public network infrastructure
		d)	a non-public (computer) network built into a non-public network infrastructure

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2. What is the meaning of the "TUNNELING" process within VPNs?

		a)	the process of encapsulating original packet into another one
		b)	the security process of the original packet
		c)	the process of cloning the original packet into another one
		d)	the process of redirecting the original packet to another VPN

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3. What do we mean by "ENCRYPTING" within VPNs?

		a)	the process of ensuring confidentiality and data integrity
		b)	the process of ensuring confidential data
		c)	the process of ensuring data integrity
		d)	the process of ensuring data immutability

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4. On which RM-OSI layer do we implement the IPSec security?

		a)	network
		b)	link
		c)	physical
		d)	transport

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5. What is the purpose of the ISAKMP protocol?

		a)	authorisation
		b)	encrypting
		c)	tunneling
		d)	validation of transferred data

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6. What is the goal of the IKE protocol?

		a)	to exchange relational keys
		b)	to set up a tunnel between the client and the server
		c)	to set the encryption method
		d)	to protect data integrity

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7. In which protocol are the IKE protocol log messages encapsulated?

		a)	ISAKMP
		b)	IPSec
		c)	TCP
		d)	UDP

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8. How many phases does IKE have?

		a)	2
		b)	1
		c)	3
		d)	4

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9. For what purpose is the Diffie-Hellman algorithm used?

		a)	it allows you to create an encrypted connection over an unsecured channel
		b)	it allows you to create an encrypted connection over a secure channel
		c)	it allows you to create unencrypted connections over an unsecured channel
		d)	it allows you to create an unencrypted connection over a secure channel

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10. What is the result of the Diffie-Hellmann algorithm?

		a)	a symmetric encryption key
		b)	an non-symmetric encryption key
		c)	a polysymetric encryption key
		d)	an asymmetric encryption key

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11. Which switch feature allows detection of ARP Cache Poisoning?

		a)	DAI
		b)	ARP
		c)	RARP
		d)	MAC

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12. How many SAs need to be built for duplex (bi-directional) VPN communication?

		a)	2
		b)	1
		c)	3
		d)	4

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13. How does the IPSec VPN connection authentication work?

		a)	by using a shared key
		b)	by using a pre-shared key
		c)	by using an encryption key
		d)	by using a relational key

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14. What kind of network attack is it, when the attacker falsifies the DHCP protocol messages in the local network (for example, by running a custom DHCP server with modified network parameters) with the goal to deceive a victim by using another default gateway?

		a)	DHCP Spoofing
		b)	DHCP Snooping
		c)	DHCP Starvation
		d)	DHCP Overloading

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15. On the contrary to Dynamic ARP Inspection, the following is checked in IP Source Guard:

		a)	fake source IP addresses
		b)	fake destination IP addresses
		c)	fake MAC addresses
		d)	fake source and destination IP addresses

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16. For which type of connection, conventional SSL VPN cannot be used?

		a)	Site to Site
		b)	remote access
		c)	LAN to Internet
		d)	open connection

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17. What is the purpose of an electronic signature?

		a)	unambiguous verification of identity of the person in relation to data message
		b)	exchange of certificates
		c)	security of the content of the data message
		d)	sender identification

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18. Which type of electronic signature ensures legal acceptance of signed documents?

		a)	qualified electronic signature
		b)	guaranteed electronic signature
		c)	digital signature
		d)	electronic signature

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19. What type of data can be signed by an electronic signature?

		a)	any digital data
		b)	text files only
		c)	multimedia files (audio, images)
		d)	executable files

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20. What is the purpose of a timestamp?

		a)	it proves the existence of a document in a given form at a specific time
		b)	indicates time when a given document was created
		c)	it indicates time when a given document was originated and who owned it
		d)	it indicates time of the latest change in a document

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