A host is attempting to send data to another host on a different network. What is the first action that the sending host will take?（）..

第1题

[] During an attempt to 'scp' between two hosts, an error indicating PRNG is not seeded is displayed. What is the likely cause of the error?（） During an attempt to 'scp' between two hosts, an error indicating PRNG is not seeded is displayed. What is the likely cause of the error?（）

A、A.The sshd user id is locked. B、B.The /var/empty directory needs to be created. C、C.PRNG is set to 'no' in the /etc/ssh/sshd_config file. D、D.The permissions on /dev/random and /dev/urandom are incorrect.

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第2题

[单选题] A host is attempting to send data to another host on a different network. What is the first action that the sending host will take?（）

A、Drop the data. B、Send the data frames to the default gateway. C、Create an ARP request to get a MAC address for the receiving host. D、Send a TCP SYN and wait for the SYN ACK with the IP address of the receiving host.

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第3题

[单选题] Refer to the exhibit.The network administrator normally establishes a telnet session with the switch from host A.However,host A is unavailable.The administrator′s attempt to the switch from host B fails,but pings to the other two hosts are successful.what is the issue?（）

A、Host B and the switch need to be in the same subnet. B、The switch needs and appropriate default gateway assigned. C、The switch interface connected to the router is down. D、Host B need to be assigned an IP address in vlan 1. E、The switch interfaces need the appropriate IP addresses assigned.

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第4题

[多选题] Click the Exhibit button. host_a is in subnet_a and host_b is in subnet_b. Given the configuration shown in the exhibit, which statement is true about traffic from host_a to host_b?（）

A、DNS traffic is denied. B、Telnet traffic is denied. C、SMTP traffic is denied. D、Ping traffic is permitted.

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第5题

[多选题] A network host is configured as follows: Host IP address: 192.168.16.183 Subnet mask: 255.255.255.224 Default gateway: 192.168.16.190 Which of the following statements describe the network to which this host is attached?（）

A、The default gateway is configured on a different subnet form this host. B、The host is a member of the fifth usable subnet of the 192.168.16.0 network. C、The subnetwork address for this host is 192.168.16.160/28. D、The address of the next higher subnet is 192.168.16.192. E、The address of the router interface that is attached to this subnetwork is 192.168.16.190. F、There are 60 usable host addresses on this subnet.

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第6题

[单选题] A Windows Communication Foundation (WCF) service is self-hosted in a console application. The service implements the IDataAccess contract, which is defined in the MyApplication namespace. The service is implemented in a class named DataAccessService which implements the IDataAccess interface and also is defined in the MyApplication namespace. The hosting code is as follows. (Line numbers are included for reference only.) 01 static void Main(string[] args) 02 { 03 ServiceHost host; 04 ... 05 host.Open（　）; 06 Console.ReadLine（　）; 07 host.Close（　）; 08 } You need to create a ServiceHost instance and assign it to the host variable. You also need to instantiate the service host.Which line of code should you insert at line 04?（）

A、host = new ServiceHost("MyApplication.DataAccessService"); B、host = new ServiceHost("MyApplication.DataAccess"); C、host = new ServiceHost(typeof(IDataAccess)); D、host = new ServiceHost(typeof(DataAccessService));

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第7题

[单选题] While attempting to expand a file system, an administrator receives an error message indicating that the filesystem is not recognized. Running the 'lsfs' command fails to display any output, but the 'df' command is working and displays normal filesystems. What is the likely cause of the problem?（）

A、The /etc/filesystems file is missing. B、The /dev/hd8 logical volume is corrupt. C、The hosting volume group is not varied on. D、The /var and /tmp filesystems may be full.

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第8题

[单选题] A technician is using a packet sniffer to identify a server. The technician observes the following network traffic: Which of the following is MOST likely to be the server?（）

A、HOST-A B、HOST-B C、HOST-C D、HOST-D

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第9题

[] What happens when Host Checker is configured to perform checks every "0" minutes? （）

A、A. Host Checker is disabled. B、B. Host Checker will perform continous checks. C、C. Host Checker will perform checks when user logs out. D、D. Host Checker will perform checks when user first logs in.

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A host is attempting to send data to another host on a different network. What is the first action that the sending host will take?（）

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