Review
A. A
An A record is the typical source of IP addresses a host can access on a DNS server
PTR is a pointer record used in reverse DNS lookups - correct answersWhich type of DNS record would a
host check to learn the IP address of a particular Web site?
A. A
B. PTR
C. CNAME
D. MX
C. TX/RX reversed
TX/RX reversed is easy to do with ST fiber connectors
Cable length is a possibility, but there is a more likely answer - correct answersNetwork technician Kyle
is troubleshooting a connectivity problem with a new data circuit. Kyle confirms that the ST fiber jumper
is good. Which of the following is the problem?
A. Bad connectors
B. Cable length
C. TX/RX reversed
D. Interference
A. It uses a shared secret to encrypt messages between the client and server
, RADIUS servers use a shared secret along with MD5 hashing for authentication. Some operating systems
may call this a "Pre-Shared Key." This is the generally known as Symmetric-key algorithms. Note: In any
normal situation, it would be a great idea to use anything except for PAP as your authentication method
because the password could still be intercepted in certain scenarios.
It can't use Public or Private keys, because that insinuates you'll be using Asymmetric-key algorithms -
correct answersA user is concerned that his password is being sent in clear text when he connects to the
RADIUS server using PAP. Which of the following is true about security using RADIUS?
A. It uses a shared secret to encrypt messages between the client and server
B. It uses a Public key to encrypt messages between the client and server
C. It uses a Private key to encrypt messages between the client and server
D. It uses a CSU/DSU to encrypt the data between the client and server
C. Crosstalk
NEXT - With near end cross talk, signal from wire(s) at the near end of the cable are being induced onto
other wire(s). - correct answersA computer user, Zaphod, is unable to log on to the domain from his
desktop computer. A cable certifier is used to check his network cable and it shows a high value of NEXT.
Which of the following is most likely the cause?
A. TX/RX reversed
B. Split cables
C. Crosstalk
D. DB loss
D. Proxy Caching
Proxy Caching - As the name implies, a proxy server can, among other things, cache Web pages for
users. If a user calls up a Web page that the proxy already has, then ISP bandwidth is not used. - correct
answersOn the corporate network, many users report that Web pages are slow to load. The network