51. At the very lowest level, what data does a computer understand?
- Media Access Control (MAC) addresses
- IP (Internet Protocol) addresses
- Binary numbers
- Hexadecimal digits
52. Network Address Translation (NAT) is typically implemented with which of these hardware devices?
- Hubs
- Routers
- Servers
- Switches
53. During the name resolution process, which server does a local recursive server contact first?
- Root name server
- Top level domain (TLD) server
- Caching name server
- Authoritative name server
54. What port on a name server is used for User Datagram Protocol (UDP) name request packets?
- 53
- 80
- 25
- 22
55. Which address does the field in DHPOFFER specify?
- The Gateway address
- The Internet Protocol (IP) address
- The Media Access Control (MAC) address
- The Data Link Layer
56. What kind of proxy is used to prevent someone from accessing sites by inspecting what data is being requested, and then allowing or denying this request, depending on what site is being accessed?
- A gateway proxy
- A reverse proxy
- An authentication proxy
A web proxy
