Which two tasks does the Dynamic Host Configuration Protocol perform?（）

单项选择题Refer to the exhibit. Which rule does the DHCP server use when there is an IP address conflict?（）

A.The address is removed from the pool until the conflict is resolved.
B.The address remains in the pool until the conflict is resolved.
C.Only the IP detected by Gratuitous ARP is removed from the pool.
D.Only the IP detected by Ping is removed from the pool.
E.The IP will be shown, even after the conflict is resolved.

单项选择题How does a DHCP server dynamically assign IP addresses to hosts?（）

A.Addresses are permanently assigned so that the host uses the same address at all times.
B.Addresses are assigned for a fixed period of time. At the end of the period, a new request for an address must be made, and another address is then assigned.
C.Addresses are leased to hosts. A host will usually keep the same address by periodically contacting the DHCP server to renew the lease.
D.Addresses are allocated after a negotiation between the server and the host to determine the length of the agreement.

单项选择题A network engineer wants to allow a temporary entry for a remote user with a specific usename and password so that the user can access the entire network over the internet.which ACL can be used?（）

A.reflexive
B.extended
C.standard
D.dynamic

单项选择题On which options are standard access lists based?（）

A.destination address and wildcard mask
B.source address and wildcard mask
C.destination address and subnet mask
D.source address and subnet mask

多项选择题What are two benefits of using NAT?（）

A.NAT protects network security because private networks are not advertised.
B.NAT accelerates the routing process because no modifications are made on the packets.
C.Dynamic NAT facilitates connections from the outside of the network.
D.NAT facilitates end-to-end communication when IPsec is enable.
E.NAT eliminates the need to re-address all host that require extemal access.
F.NAT conserves addresses through host MAC-level multiplexing.