Which of the following are true regarding a network using a subnet mask of 255.255.248.0?()A. It corresponds to a Class A address with 13 bits borrowed.B. It corresponds to a Class B address with 4 bits borrowed.C. The network address of the last subnet w

第1题：

An engineer is trying to summarize the following networks using the "ip summary- address eigrp"command: 10.8.88.0/25 10.8.89.48/29 10.8.64.96/27 Which network and subnet mask below would be the smallest EIGRP summary address to include all three subnets?（）

• A、10.8.64.0 255.255.224.0
• B、10.8.64.0 255.255.128.0
• C、10.8.64.0 255.255.192.0

第2题：

An administrator needs a network that can support up to 800 hosts on the same subnet. Which of the following is the MINIMUM subnet mask that should be used？（）

• A、255.0.0.0
• B、255.255.0.0
• C、255.255.252.0
• D、255.255.255.0

第3题：

Which of the following are true regarding a network using a subnet mask of 255.255.248.0?（）

• A、It corresponds to a Class A address with 13 bits borrowed.
• B、It corresponds to a Class B address with 4 bits borrowed.
• C、The network address of the last subnet will have 248 in the 3rd octet.
• D、The first 21 bits make the host portion of the address.
• E、This subnet mask allows for 16 total subnets to be created.
• F、The subnetwork numbers will be in multiples of 8.

第4题：

For client computers to access the Internet when using DHCP， the DHCP server must have configurations for at LEAST which of the following？ （）

• A、 Gateway address
• B、 SNA server
• C、 Mail server
• D、 Web server
• E、 Subnet mask

第5题：

A network administrator of a company has many branch locations each using a subnet mask of 255.255.255.224. Which of the following dynamic routing protocols should be used？（）

• A、IPv6
• B、RIP
• C、IGRP
• D、RIPv2

第6题：

Which two statements are true of a network mask?（）

• A、A subnet mask specifies the portion of an IP address that is in a binary format
• B、A subnet mask specifies the portion of an IP address that is in a decimal format
• C、A subnet mask specifies the portion of an IP address that represents a network prefix
• D、A subnet mask specifies the portion of an IP address that represetns network hosts

第7题：

A class B network 129.35 has 10 subnets. Which of the following options is the correct subnet mask？（）

• A、255.255.128.0 （11111111.11111111.10000000.00000000）
• B、255.255.192.0 （11111111.11111111.11000000.00000000）
• C、255.255.224.0 （11111111.11111111.11100000.00000000）
• D、255.255.240.0 （11111111.11111111.11110000.00000000）

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第13题：

A network administrator provides an IP address of 128.135.0.142 and a subnet mask of 255.0.0.0.  Once a ping is attempted， it fails.  Which of the following options is the most probable cause of the failed ping？（）

• A、0 is not valid in an IP address
• B、128 is a reserved network
• C、The subnet mask should be 255.255.0.0. since it is a class B
• D、A network problem has occurred since IP and subnet are valid

第14题：

You have a class B network with a 255.255.255.0 mask. Which of the statements below are true of this network?（）

• A、There are 254 usable subnets.
• B、There are 256 usable hosts per subnet.
• C、There are 50 usable subnets.
• D、There are 254 usable hosts per subnet.
• E、There are 24 usable hosts per subnet.
• F、There is one usable network.

第15题：

The following configuration command was entered into a router:ip route 172.16.3.0 255.255.255.0 192.168.2.4 Which of the following statements are true regarding this configuration change?（）

• A、The default administrative distance is used.
• B、The command is used to establish a static route.
• C、The command is used to configure the router interfaces.
• D、The command is used to establish a stub network.
• E、The subnet mask for the source address is 255.255.255.0

第16题：

A technician needs to assign a default subnet mask for a class B network to a network device that was just installed. Which of the following would the technician use?（）

• A、224.0.0.1
• B、255.0.0.0
• C、255.255.0.0
• D、255.255.255.0

第17题：

Which two statements are true of a network mask?（）

• A、A subnet mask specifies the portion of an IP address that is in a binary format.
• B、A subnet mask specifies the portion of an IP address that is in a decimal format.
• C、A subnet mask specifies the portion of an IP address that represents a network prefix.
• D、A subnet mask specifies the portion of an IP address that represents network hosts.

第18题：

You work as a network administrator at ABC.com. The ABC.com network consists of a single domain named ABC.com. All servers on the ABC.com network have Windows Server 2012 R2 installed.The network as a server named ABC_SR05 that provides DHCP services.  You need to create a new IPv4 subnet on the network. The subnet must support a maximum of 5，000 hosts and must have a few unused addresses as possible.  How would you configure DHCP to support this subnet？（）

• A、You should use a subnet mask of 255.255.255.0.
• B、You should use a subnet mask of 255.255.248.0
• C、You should use a subnet mask of 255.255.240.0.
• D、You should use a subnet mask of 255.255.224.0
• E、You should use a subnet mask of 255.255.128.0
• F、You should use a subnet mask of 255.255.0.0

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