In Three-Way Handshaking process, the situation where both the TCP’s issue an active open is ___________

• A. Mutual open
• B. Mutual close
• C. Simultaneous open
• D. Simultaneous close

A malicious attacker sends a large number of SYNC segments to a server, pretending that each of them is coming from a different client by faking the source IP address in the datagram. Which type of attack is being performed in this situation?

• A. Sync flooding attack
• B. Active attack
• C. Passive attack
• D. Denial-of-service attack

SYNC flooding attack belongs to a type of security attack known as ___________

• A. Sync flooding attack
• B. Active attack
• C. Passive attack
• D. Denial-of-service attack

The sizes of source and destination port address in TCP header are ___________ respectively.

• A. 16-bits and 32-bits
• B. 16-bits and 16-bits
• C. 32-bits and 16-bits
• D. 32-bits and 32-bits

What allows TCP to detect lost segments and in turn recover from that loss?

• A. Sequence number
• B. Acknowledgment number
• C. Checksum
• D. Both sequence & acknowledgment number

A ___________ is an extension of an enterprise’s private intranet across a public network such as the internet, creating a secure private connection.

• A. Vnp
• B. VPN
• C. Vsn
• D. Vspn

When were VPNs introduced into the commercial world?

• A. Early 80€?s
• B. Late 80€?s
• C. Early 90€?s
• D. Late 90€?s

What protocol is NOT used in the operation of a VPN?

• A. Pptp
• B. Ipsec
• C. Ymum
• D. L2tp

Which of the following statements is NOT true concerning VPNs?

• A. Financially rewarding compared to leased lines
• B. Allows remote workers to access corporate data
• C. Allows LAN-to-LAN connectivity over public networks
• D. Is the backbone of the internet

Traffic in a VPN is NOT ____________

• A. Invisible from public networks
• B. Logically separated from other traffic
• C. Accessible from unauthorized public networks
• D. Restricted to a single protocol in ipsec