（）, or drum is used for hauling in or letting out the wires or ropes which will fasten the ship to the shore.

The （） is used for hauling in or letting out the wires or ropes.

The Testking network is implementing dialup services for their remote employees.Testking uses several different Layer 3 protocols on the network. Authentication ofthe users connecting to the network is required for security. Additionally, some employees will be dialing long distance and will need callback support.Which protocol is the best choice for these remote access services?（）

For each blank，choose the best answer from the four choices and write down on the answer sheet．(66) is a protocol that a host uses to inform. a router when it joins or leaves an Internet multicast group．(67) is an error detection code that most data communication networks use．(68) is an interior gateway protocol that uses a distance vector algorithm to propagate routing information．(69) is a transfer mode in which all types of information are organized into fixed form. cells on an asynchronous or non -periodic basis over a range of media.(70) is an identifier of a web page.

Which protocol below uses TCP port 443?（）

Which three protocols use TLVs to carry attributes？（）

ou need to create a data block for query operations in the RETIRED_EMPLOYEES form module. Which three data sources can you use for this block?（）

You are designing a top-level OU structure to meet the business and technical requirements. Which top-evel OU or OUs should you use?（）

（ ）estimating is a technique for estimating the duration or cost of an activity ou project using historical data from a similar activity or project.

Which IPsec security protocol should be used when confidentiality is required?（）

Which WAN protocol is used for out-of-band signaling?（）

Which oil is not suitable for use as storm oil?（）