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A receiving host computes the checksum on a frame and determines that the frame is damaged.Theframe is then discarded.At which OSI layer did this happen？（）
A . session
B . network
C . physical
D . data link
E . transport
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R1 forwards a packet from Host 1 to remote Server 1. Which statement describes the use of a MAC as the frame carrying this packet leaves the s0/0/0 interface of R1（）。
A . The frame does not have MAC addresses.
B . The source MAC address in the frame is the MAC address of the NIC of Host 1.
C . The source MAC address in the frame is the MAC address of the s0/0/0 interface of R1.
D . The destination MAC address in the frame is the MAC address of the NICof server 1.
E . The destination MAC address in the frame is the MAC address of the s0/0/0 interface of R2
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A：Can I buy two or three cards fro meachset？B：Oh，sorry，Wesellitby（）.
A . A、singly
B . B、apiece
C . C、set
D . D、sets
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A user cannot ping any other hostnames from an AIX machine. The error received is "host name earth NOT FOUND". Which of the following files is most likely configured incorrectly？（）
A . /etc/resolv.conf
B . /etc/rc.tcpip
C . /etc/aliases
D . /etc/hosts.equiv
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When a packet is sent from Host 1 to Server 1, in how many different frames will the packet be encapsulated as it is sent across the internetwork?（）
A . 0
B . 1
C . 2
D . 3
E . 4
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Host 1 has just started up and requests a web page from web server 2. Which two statements describe steps in the process Host 1 uses to send the request to web server 2 (choose two)（）。
A . Host 1 addresses the frames to the MAC address of router R1
B . Host 1 looks in its ARP cache for the MAC address of router R1
C . Host 1 addresses the frames to the MAC address of web server 2
D . Host 1 sends the packets to router R1 to be forwarded to web server 2
E . Host 1 sends a broadcast ARP request to obtain the MAC address of webserver2
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You install the FTP role service on a server that runs Windows Server 2008. Users receive an errormessage when they attempt to upload files to the FTP site. You need to allow authenticated users to upload files to the FTP site. What should you do？（）
A . Run the ftp Ca 192.168.1.200 command on the server that runs Windows Server 2008.
B . Run the appcmd unlock config command on the server that runs Windows Server 2008.
C . Configure Write permissions on the FTP site. Configure the NTFS permissions on the FTP destination folder for the Authenticated Users group to Allow - Modify.
D . Configure Write permissions on the FTP site. Configure the NTFS permissions on the FTP destination folder for the Authenticated Users group to Allow C Write attributes.
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On the network 131.1.123.0/27, what is the last IP address that can be assigned to a host?（）
A . 131.1.123.30
B . 131.1.123.31
C . 131.1.123.32
D . 131.1.123.33
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Refer to the exhibit.
https://assets.asklib.com/images/image2/2018073015554566566.jpg
Which of the following should you do to configure the IP phone to override the priority of the data packets it receives from the host？ （）
A . Issue the mls qos trust cos command on the switch port connected to the IP phone.
B . Issue the switchport priority extend cos command on the switch port connected to the IP phone.
C . Issue the switchport priority extend cos command on the IP phone.
D . Issue the mls qos trust cos command on the IP phone.
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An administrator received a call from a user whose PC crashed while using vi to edit a file. The user wants the edited file back. Where should the administrator look for the file（）
A . /tmp
B . /var/preserve
C . /var/tmp/$USER
D . $HOME/.vi
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Refer to the graphic.Host A is communicating with the seiver. What will be the source MAC address of the frames received by Host A from the server?（）https://assets.asklib.com/images/image2/201807231637111319.jpg
A . the MAC address of the seiver network interface
B . the MAC address of host A
C . the MAC address of router interface e 1
D . the MAC address of router interface e0
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You received the following error： ORA-01578： ORACLE data block corrupted （file # %s， block # %s） Which file will you check to view additional information regarding the cause of this error？（）
A . the alert log file and the trace files
B . the redo log files
C . the control file
D . the change tracking file
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You install the FTP role service on a server that runs Windows Server 2008. Users receive an errormessage when they attempt to upload files to the FTP site. You need to allow authenticated users toupload files to the FTP site. What should you do？（）
A . Run the ftp Ca 192.168.1.200 command on the server that runs Windows Server 2008.
B . Run the appcmd unlock config command on the server that runs Windows Server 2008.
C . Configure Write permissions on the FTP site. Configure the NTFS permissions on the FTP destinationfolder for the Authenticated Users group to Allow - Modify.
D . Configure Write permissions on the FTP site. Configure the NTFS permissions on the FTP destinationfolder for the Authenticated Users group to Allow C Write attributes.
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A host is expected to be a mail relay or receiving endpoint. Which of the following daemons should be listening for connections on port 25？（）
A . ftpd
B . imapd
C . pop3d
D . sendmail
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How should an administrator change the order in which host name lookup is performed so that it reads the host file before using DNS?（）
A . Edit the /etc/inetd.conf file so that it reads 'local, bind'.
B . Edit the /etc/resolv.conf file so that it reads 'local, bind'.
C . Edit the /etc/netsvc.conf file so that it reads 'local, bind'.
D . Edit the /etc/nslookup.conf file so that it reads 'local, bind'.
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The operating system filecratabin the Linux platform gets updated whenever you create a new database on the same host machine. What kind of information is stored is stored in this file？（）
A . OracleSIDsonly
B . Oracle homes only
C . Oracle install timestamp
D . Oracle inventory pointer files
E . Oracle database creation timestamp
F . OracleSIDsand Oracle homes only
G . OracleSIDs， Oracle homes and flag for auto startu
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The operating system file cratab in the Linux platform gets updated whenever you create a new database on the same host machine. What kind of information is stored is stored in this file？（）
A . OracleSIDsonly
B . Oracle homes only
C . Oracle install timestamp
D . Oracle inventory pointer files
E . Oracle database creation timestamp
F . OracleSIDsand Oracle homes only
G . OracleSIDs， Oracle homes and flag for auto startu
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In a Cisco Unified Computing System， What is the "designated receiver" port in end-host mode used for？（）
A . Sending all broadcasts
B . Receiving all traffic from upstream switches
C . Receiving broadcast traffic
D . Negotiating spanning tree with upstream switches
E . Learning MAC addresses from upstream switche
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（ ）is used to facilitate the writer’s numbering and filing of the letters he or she receives.
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设循环队列的结构如题33。若有一个Queue类型的队列Q，计算队列元素个数应该用（34)。A．（Q.rear-Q.fro
设循环队列的结构如题33。若有一个Queue类型的队列Q，计算队列元素个数应该用(34)。
A．(Q.rear-Q.front+ MaxSize)%MaxSize；
B．Q.rear-Q.front+1；
C．Q.rear-Q.front-1；
D．Q.rear-Qfront；
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You are having problems with connections from a specific host （192.168.1.15) not closing d
You are having problems with connections from a specific host (192.168.1.15) not closing down correctly.You want to find the state of the threads from that host check for long-running queries. Which statement will accomplish this？（）
<img src='https://img2.soutiyun.com/ask/uploadfile/2019-03-27/b309af194492887257d77076f689b011.jpg' />
A.A
B.B
C.C
D.D
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判断一个顺序存储的队列sp为空的条件是（)。A.sp->front=sp->rearB.sp->front=sp->rear+1C.sp->fro
判断一个顺序存储的队列sp为空的条件是()。
A.sp->front=sp->rear
B.sp->front=sp->rear+1
C.sp->front=sp->rear-1
D.sp->front=NULL
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On July 10, TechCom received a $1,000, 90-day, 12% promissory note as a result of a sale to Julia Browne. So the interest should be $30.
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On August 1, 2004, the compnay received a 12-month insurance premium from its clients
A．A.3000
B．B.12000
C．C.0
D．D.6000
