Rewrite the following sentences on the basis of general principles of business letter-writing ： We beg to acknowledge receipt of your letter of_____, 20…

A . en0 B . lo0 C . tr0 D . ping results in "Sendto：Network is unreachable" message

A . these B . - C . what D . when

A . 0 B . 1 C . 2 D . 3 E . 4

A . Route-Target Rewrite is mainly used in Inter-AS MPLS-VPN deployments and is configured at the PErouter in originating AS ASBR to avoid misconfiguration in Route-Target assignment for VPN configurations. B . Route-Target Rewrite is mainly used in Inter-AS MPLS-VPN deployments and is configured at the route-Reflector in originating AS ASBR to avoid misconfiguration in Route-Target assignment for VPN configurations. C . Route-Target Rewrite is mainly used in Inter-AS MPLS-VPN deployments and is configured at the ASBR to avoid misconfiguration in Route-Target assignment for VPN configurations. D . None of the above.

A . follow-up system B . transmitter C . phantom element D . azimuth motor

A . Seriously injured B . To be seriously C . Being injured seriously D . Having injured

A . It is mainly used in Intra-AS MPLS VPLS deployments and is configured at the ASBR to avoid misconfiguration of the Route Target assignment for VPN configurations B . It is mainly used in Inter-AS MPLS VPN deployments and is configured at the ASBR to avoid misconfiguration of the Route Target assignment for VPN configurations C . It is mainly used in Intra-AS MPLS VPLS deployments and is configured at the Router Reflectorto avoid misconfiguration in Route Target assignment for VPN configurations D . It is mainly used in Inter-AS MPLS VPLS deployments and is configured at the Router Reflectorto avoid misconfiguration of the Route Target assignment for VPN configurations E . It is mainly used in Inter-AS MPLS VPLS deployments and is configured at the PE router to avoid to misconfiguration of the Route Target assignment for VPN configuratio

A . Following a link flap in the BGP speaker’s AS B . During initial convergence. C . Following a Route Processor Switchover. D . Just before sending a CEASE message to tear down the session. E . During capability negotiatio

A .  vmtune -w B .  svmon -w C .  schedtune -w D .  vmstat -

A . by all means B . by no means C . by any means D . by means of

A . After the route target replacement policy is applied to the target router， the BGP session need not be refreshed manually to put the policy into operation. B . Route Target Rewrite allows the administration of the routing policy to stay local to the AS. C . Route target replacement is always done by the ASBR. D . Route target rewrites are supported for VRF export maps. E . Route target replacement can be done on incoming and outgoing BGP updates.

A .  Segment Advisor B .  SQL Access Advisor C .  Undo Advisor D .  SQL Tuning Advisor

A．Signal B．sign C．mark D．symbol

A、quickly B、immediately C、hurriedly

Exercise 7 Rewrite the sentences after the model. MODEL: During the second week I was at college, I had to go out and look for a bank. I could open an account in that bank. During the second week I was at college, I had to go out and look for a bank where I could open an account. 1. We want to look for a place. There are no cars parked on the streets in that place.