Test your basic knowledge |

Instructions:
  • Answer 50 questions in 15 minutes.
  • If you are not ready to take this test, you can study here.
  • Match each statement with the correct term.
  • Don't refresh. All questions and answers are randomly picked and ordered every time you load a test.

This is a study tool. The 3 wrong answers for each question are randomly chosen from answers to other questions. So, you might find at times the answers obvious, but you will see it re-enforces your understanding as you take the test each time.
1. Physical layer - Data link layer - Network Layer - Transport Layer - Session Layer - Presentation Layer - Application Layer






2. FIN 130 - ACK 131 - FIN 570 - ACK 571






3. 1. physical 2. data 3. network 4. transport 5. session 6. presentation 7. application






4. Small program triggered by an event that provides an action. E.g. scheduled file removal if countdown isn't reset - ie: employee was fired






5. 128.0.0.0 through 191.255.255.255 - with a subnet mask of 255.255.0.0






6. Take the file and try to compress it. If it compresses - it means there is a pattern and it's more easily crackable

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7. Bits of code embedded in programs to quickly gain access at a later time






8. A low end firewall that can quickly be deployed using existing hardware. They examine packets themselves with no content.






9. Confidentiality - integrity - availability






10. Replicates traffic onto all ports - no traffic monitoring - cannot control which ports should or shouldn't receive frames - forming a large collision domain.






11. Four layers - Network Layer - Internet Layer - Transport Layer - Application layer






12. Good for multimedia - can use small single packets - multicasting is required - speed is the highest priority






13. It makes sure the data sent from one side to the other is in a format useful to the other side






14. When someone has compromised the integrity of data or a program. Allows attackers to create backdoors.






15. An agreement on how different computer will work - protocols define the format and order of messages and what to do upon receipt of the messages - basically the rules of the network






16. destruction of data - leaking confidential information - providing backdoor access






17. Spread as an office attachment with executable code programmed using macro facility - targets are data files - visual basic editor and other macro languages - payload executes when the code is launched






18. keeps the same letters - but changes the position within the text - easy to break - can be combined with substitution






19. Hash Authentication - asymmetric - non repudiation - digital signature - hash + asymmetry






20. Stateful firewalls maintain state of traffic flows






21. Attacks systems through known vulnerabilities - automatically scans for more systems to attack - lowers system defenses - installs rootkit or root shell - opens up back doors - self contained malware that can copy itself






22. Anonymous FTP - FTP passes through clear text - Bounce attacks with the PORT command - user can cause an FTP to open a connection from the FTP's own commands and bypass a firewall






23. Migrate to WPA2 - use strong authentication like PEAP or TTLS - audit network installations - require mutual auth between client and infrastructure equipment






24. rules indicate criteria in packets that represent events of interest - rules are applied to packets as they are received - alerts are created when matches are found






25. A system resource that has no legitimate purpose or reason for someone to connect to it - its purpose is to draw in attackers to understand how they break into a system






26. 1.0.0.0 through 127.255.255.255 - subnet mask starts at 255.0.0.0






27. Netmasks or subnets provide a method for identifying what portion of an address is the network - and what portion is the host






28. Not frequently seen on LANs because of expense - because of its traffic predictability and high bandwidth support - it's good for video streaming - encapsulates common protocols - uses virtual path identifiers to create end to end connectivity - has






29. An attacker recruits zombie systems ahead of time to simultaneously release a flood of traffic at a specific target.






30. flags anomalous conditions in traffic on the network - requires understanding on what is normal - bases good traffic as a baseline






31. It interacts with data and prepares it to be transmitted across the network. It ensures reliable connectivity from end-to-end






32. Common backdoor to open a port - port scan scans for open ports on remote host - scans 0 - 65 -535 twice. TCP and UDP






33. Weakness in a system - inherent in a complex system - majority are due to poor coding - gateway by which threats are manifested






34. TCP/IP - the IP protoco - The core routing protocol of the internet - - deals with transmission of packets between end points - defines the addressing scheme for the internet






35. Used for connecting two physical segments of a network - segments traffic - breaks up collision domains - not generally used because of switches






36. Strips OS commands and characters from input - avoid making system calls from within the app * especially based on user input






37. packet filter firewalls rely on TCP flags to determine connection state. Attacker can send ACK packets only to bypass firewall.






38. True positive - false positive - true negative - false negative






39. Means multiple iterations won't matter. If you encrypt with a key - then re-encrypt - it's the same as using one key.






40. 53 bytes - 48 bytes for data - 5 bytes for the header






41. Protected at rest - protected in transit - secure the key






42. A list of files is defined that should be monitored for a change - HIDS software calculates a one-way hash for each file - if a change is made to the file - the hash is changed






43. Very simplistic. All systems are attached to the same cable segment. Rarely used because they're unreliable - low fault tolerance - poor traffic isolation - with limited scalability






44. Message in its encrypted form






45. An FTP that allows downloads only if the user knows the exact name of the file they're looking for






46. Protects internal/external systems from attack - filters communications based on content - performs NAT - encrypts communications for VPN - logging to aid in intrusion detection






47. Identify critical assets and provide layered protection - data is accessed by applications - applications reside on hosts - hosts operate on networks






48. 53 - DNS - 67 - BootP - 68 - BootP - 69 - TFTP - 123- NTP - 137-139 NBT - 161 - SNMP - 162 - SNMP - 2049 - NFS






49. The practice of sending an ACK inside another packet going to the same destination






50. A cracking tool inserted into the OS that allows the attacker to do as they please.







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