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单选题
An attacker sends a low rate of TCP SYN segments to hosts， hoping that at least one port replies. Which type of an attack does this scenario describe？（）
A
DoS
B
SYN flood
C
port scanning
D
IP address sweep
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考题
An attacker sends a low rate of TCP SYN segments to hosts， hoping that at least one port replies. Which type of an attack does this scenario describe？（）A、DoSB、SYN floodC、port scanningD、IP address sweep
考题
TCP端口全扫描方式，扫描、被扫描端口（开放）间的会话过程（）。A、SYN－SYN+ACK－ACK－ACK+FINB、SYN－SYN+ACK－RSTC、SYN－ACK+RSTD、SYN－SYN+ACK－ACK+FIN
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单选题You have 100 segments in the USERS tablespace. You realize that the USERS tablespace is running low on space. You can use Segment Advisor to（）.A
add data files to the tablespace B
identify the segments that you should shrink C
modify the storage parameters for the tablespace D
automatically shrink the segments with unused space E
check the alerts generated for the tablespace that is running low on space
考题
单选题You have 100 segments in the USERS tablespace. You realize that the USERS tablespace is running low on space. You can use Segment Advisor to（）。A
identify the segments that you should shrinkB
modify the storage parameters for the tablespaceC
automatically shrink the segments with unused spaceD
check the alerts generated for the tablespace that is running low on space
考题
多选题What statements are true regarding ICMP packets?（）AThey acknowledge receipt of TCP segments.BThey guarantee datagram delivery.CThey can provide hosts with information about network problems.DThey are encapsulated within IP datagrams.EThey are encapsulated within UDP datagrams.
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单选题Rate your level of proficiency with implementing， managing， and troubleshooting network protocols and services， including TCP/IP protocol， dial-up networking， Internet Information Services （IIS）， remote desktop， and Internet connection firewalls.（）A
Very HighB
HighC
ModerateD
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考题
单选题How doTCP SYN attacks take advantage ofTCPto prevent new connections from being established to a host under attack？（）A
These attacks send multiple FIN segments forcing TCP connection release.B
These attacks fill up a hosts’ listen queue by failing to ACK partially openedTCPconnections.C
These attacks take advantage of the hosts transmit backoff algorithm by sending jam signals to the host.D
These attacks increment the ISN of each segment by a random number causing constant TCP retransmissions.E
These attacks send TCP RST segments in response toconnection SYN+ACK segments forcing SYN retransmissions.
考题
单选题Which statement is true about a Smurf attack？（）A
It sends ping requests in segments of an invalid sizeB
It intercepts the third step in a TCP three-way handshake to hijack a sessionC
It sends ping requests to a subnet， requesting that devices on that subnet send ping replies to a targetsystemD
It uses Trojan horse applications to create a distributed collection of zombie computers， which can beused to launch a coordinated DDoS attack
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多选题Although TCP segments differ from UDP segments, they both contain some common fields. What two segments do they share in common?（）Asource addressBoptionsCsequence numberDsourcesEdestination portFchecksum
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