DNS 2
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DNS 2
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25 Questions

1. Network layer protocol functionality on hosts is mostly deployed as software in the form of ____

2. A 6to4 ____ is a specialized device that acts as an IPv6/IPv4 router.

3. A(n) ____ is a proxy server or terminal server that has one interface on the production network for you to access a terminal via Secure Shell (SSH) or access a virtual desktop.

4. The obvious solution to an Internet running two versions of IP is to have it populated by hosts and routers that also run two versions of IP.

5. A(n) ____________________ seeks to resolve a domain name to a corresponding numeric IP address: it simply provides a symbolic domain name, and expects a numeric IP address in return.

6. With IPv6-over-IPv4, when the IPv4 header is created, the protocol field value is set at ____ to indicate that it is an encapsulated IPv6 packet.

7. ____ means restricting who may view or use certain resources, including access to bandwidth or a computer, as well as access to information.

8. Strictly speaking, VPNs use tunneling protocols; therefore, they need to encrypt tunneled traffic.

9. RFC 6145 describes ____ IP/ICMP translation, or SIIT.

10. ____ is used to connect dual-stack IPv4/IPv6 devices across IPv4 network infrastructures.

11. Files that map addresses to domain names for reverse lookups are usually called ____.

12. The reasons for which a company is deploying IPv6 should not determine the due dates and project funding

13. attempts to translate an IPv4 address into its IPv6 equivalen

14. When deploying IPv6, ____ is perhaps the most critical and difficult task.

15. UDP runs up to ____ percent faster than TCP, under some conditions, because it does next to nothing.

16. A name query seeks to resolve an address to a domain name, and is also known as a(n) ____________________.

17. The ____________________ is distinguished from other name servers for a domain by its ability to always read its data from a zone file on disk when the DNS service starts up

18. The ____________________ window is always the lesser of what the network and receiver can handle.

19. ____ is a process of borrowing identity information, such as an IP address, domain name, NetBIOS name, or TCP or UDP port numbers to hide or deflect interest in attack activities.

20. A ____ record is used to create aliases.

21. A ____ is a weak spot or known place of attack on any common operating system, application, or service.

22. The purpose of ____ is to find out what you have and what is vulnerable.

23. A relatively simple software program called a(n) ____ can attempt to communicate with any IP-based system while cycling through all valid TCP and UDP port addresses.

24. ____ store recently accessed DNS records from other domains to avoid incurring the performance overhead involved in making a remote query each time a resource outside the local domain is accessed

25. A(n) ____ record stores IP address-to-domain name translation data and supports the operation known as a reverse DNS lookup

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