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Which term describes the process of encapsulating IPv6 packets inside IPv4 packets?()

A.tunnelingB.hashingC.routingD.NAT

文中( 4 )处正确的答案是( )。 A.bitsB.frequenciesC.packets D.messages

文中（ 4 ）处正确的答案是（）。A．bitsB．frequenciesC．packetsD．messages

What is the OSPF default frequency,in seconds,at which a cisco router sends hello packets on a multiaccess network?()

A.10B.40C.30D.20

A network admin wants to know every hop the packets take when he accesses cisco.com. Which command is the most appropriate to use?()

A.path cisco.comB.debug cisco.comC.trace cisco.comD.traceroute cisco.com

Which tables of EIGRP route information are held in RAM and maintained through the use of hello and update packets (Choose two.)()。

A.neighbor tableB.SPF tableC.RTP tableD.topology tableE.query tableF.DUAL table

An inbound access list has been configured on a serial interface to deny packet entry for TCP and UDP ports 21, 23 and 25. What types of packets will be permitted by this ACL (Choose three.)()。

A.FTPB.TelnetC.SMTPD.DNSE.HTTPF.POP3

An inbound access list has been configured on a serial interface to deny packet entry for TCP and UDP ports 21, 23 and 25. What types of packets will be permitted by this ACL? ()

A.FTPB.TelnetC.SMTPD.DNSE.HTTPF.POP3

On point－to－point networks, OSPF hello packets are addressed to which address()。

A.127.0.0.1B.172.16.0.1C.192.168.0.5D.223.0.0.1E.224.0.0.5F.254.255.255.255

A host on the LAN is accessing an FTP server across the Internet. Which of the following addresses could appear as a source address for the packets forwarded by the router to the destination server()。 - 作业搜

A.10.10.0.1B.10.10.0.2C.199.99.9.33D.199.99.9.57E.200.2.2.17F.200.2.2.18

Which type of attack is characterized by a flood of packets that are requesting a TCP connection to a server()。

A.denial of serviceB.brute forceC.reconnaissanceD.Trojan horse

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