Host A opens a Telnet connection to Host B. Host A then opens another Telnet connection to Host B. These connections are the only communication between Host A and Host B. The security policy configuration permits both connections. How many sessions exist between Host A and Host B?（）
第1题：
A. DNS traffic is denied.
B. Telnet traffic is denied.
C. SMTP traffic is denied.
D. Ping traffic is permitted.
第2题：
You‘re the systems administrator at Testing, and you create the following access control lists.You then enter the command "ip access-group 101 in" to apply access control list 101 to router TK1s e0 interface.Which of the following Telnet sessions will be blocked as a result of your access lists?（）
A. Telnet sessions from host A to host 5.1.1.10
B. Telnet sessions from host A to host 5.1.3.10
C. Telnet sessions from host B to host 5.1.2.10
D. Telnet sessions from host B to host 5.1.3.8
E. Telnet sessions from host C to host 5.1.3.10
F. Telnet sessions from host F to host 5.1.1.10
第3题：
A、network configuration
B、host systems
C、routers
D、softwares
第4题：
DHCP是下面哪些英语单词的缩写（）.
第5题：
A.Addresses are allocated after a negotiation between the server and the host to determine the length of the agreement.
B.Addresses are assigned for a fixed period of time.At the end of period,a newquest for an address must be made,and another address is then assigned.
C.Addresses are leased to host.A host will usually keep the same address by periodically contacting the DHCP sever to renew the lease.
D.Addresses are permanently assigned so that the host uses the same address at all times.
第6题：
A.ARP
B.RARP
C.TCP
D.UDP
E.IP
F.ICMP
G.BootP
第7题：
The access control list shown in the graphic has been applied to the Ethernet interface of router R1using the ip access-group 101 in command.Which of the following Telnet sessions will be blocked by this ACL？（）
A.from host PC1 to host 5.1.1.10
B.from host PC1 to host 5.1.3.10
C.from host PC2 to host 5.1.2.10
D.from host PC2 to host 5.1.3.8
第8题：
Host A opens a Telnet connection to Host B. Host A then opens another Telnet connection to Host B. These connections are the only communication between Host A and Host B. The security policy configuration permits both connections.How many sessions exist between Host A and Host B?（）
A.1
B.2
C.3
D.4
第9题：
A.Dynamic Host Configuration Protocol
B.Dynamic Host Connection Protocol
C.Dynamic Hot Connection Protocol
D.Denial Host Configuration Protocol
第10题：
In the "host to host" layer of the DOD model, which of the following is a valid connection oriented protocol?（）