What is true about Quality of Service （QoS） for VPNs？（）

A .  All TCPoptions are supported， such as largewindows. B .  The server can have more than8 unique MSS values. C .  SYN cookies are not implemented as a method of defending against SYN floods. D .  SYN cookies are implemented as a method of defending against SYN floods.

A . Once created, a sequence belongs to a specific schema. B . Once created, a sequence is linked to a specific table. C . Once created, a sequence is automatically available to all users. D . Only the DBA can control which sequence is used by a certain table. E . Once created, a sequence is automatically used in all INSERT and UPDATE statements.

A . Traffic and prefixes originating from Source AS are carried across a Transit AS to reach theirdestination AS B . Traffic and prefixes originating from Transit AS are carried across a Stub AS to their destination AS C . Traffic and prefixes originating from Transit AS are carried across a Stub AS to their Source AS D . None of the above

A . provides an opportunity to build short-term consultative relationships with customers B . provides an opportunity to build long-term consultative relationships with customers C . provides an opportunity to build consultative relationships with customers D . provides an opportunity to sell more product

A . It is a server-side PL/SQL procedure. B . When executing a PL/SQL function activity, it will automatically ping (cache) the PL/SQL code. C . It executes deferred activities in decreasing order of their Cost property value (activities with higher cost value are processed first). D . It would fail if another background engine process is started to handle the same type of activities within the same item type. E . During its single invocation, it processes activities that were stuck, deferred or timed out when the background engine was started.

A．It must be paid in one lump sum. B．There is a reduced rate for those who register soon. C．There is a 10% discount for new subscribers. D．It is cheaper for association members.

A．He passed away in 1970 after having a long battle with cancer. B．/'// walk with you is the only song that he could be remembered for. C．Jimmy has 7 children. D．He had been addicted to taking the diet pill.

A．It is a family-owned business. B．It has been in business for 45 years. C．It is the largest furniture dealer in Chicago. D．It has recently been bought by another company.

A．Its employment rate is lower than the national average. B．Its economic forecast is positive. C．Its mortgage rates have reached record lows. D．Its housing market is finally stabilizing.

A．It can be used for personal purposes. B．It is applied to all purchases from the recommended NU Supply Vendors. C．If a person pays sales tax, it can be reimbursed later. D．Students can enjoy the tax benefits when purchasing for office use.

A．It is for more than $1 million. B．It is an extension of an existing grant. C．It is awarded by the Bridgeport Revitalization Committee. D．It is the largest the BRC has ever received.

A．They hold a yearly fundraiser. B．They sponsor local sports teams. C．They are opening a new location. D．They have been in operation for 25 years.

A．It is controlled by a private company. B．It runs more frequently on weekends. C．It is one of several ways to reach the island. D．It does not function during the winter months.

A．Some disabled people also take part in the London Marathon. B．Being able to see the most famous urban scenery in the world is appealing to competitors. C．The London Marathon is No. 1 sports event in Britain. D．Many spectators will enjoy not only those potential winners but also common runners. 此题为多项选择题。

A．It is made of wood only. B．It is made of graphite only. C．It has erasers.

A．Workers are all paid by the day. B．Someone who has an experience gets high pay. C．There is no pay check for the first few months. D．It depends on how the graduate nurses do on their jobs.