In network that support VLSM, which network mask should be used for point－to－point WAN links in order to reduce waste of IP addresses?()A./24B./30C./27D./26E./32

第1题：

All of the routers in the network are configured with the ip subnet-zero command. Which network addresses should be used for Link A and Network A (Choose two.)（）。

• A、Network A - 172.16.3.48/26
• B、Network A - 172.16.3.128/25
• C、Network A - 172.16.3.192/26
• D、Link A - 172.16.3.0/30
• E、Link A - 172.16.3.40/30
• F、Link A - 172.16.3.112/30

第2题：

You have a network that supports VLSM and you need to reduce IP address waste in your point to point WAN links. Which of the masks below would you use?（）

• A、/38
• B、/30
• C、/27
• D、/23
• E、/18
• F、/32

第3题：

What is the purpose of a network mask?（）

• A、It is used in conjunction with the wildcard mask to determine the number of hosts on a network
• B、It is used to define which parts of the IP address are allocated to host addresses and network prefixes
• C、It is used to hide subnets from external networks by masking the subnets with NAT
• D、It is used to differentiate a network as a classful network or a classless network

第4题：

In network that support VLSM, which network mask should be used for point-to-point WAN links in order to reduce waste of IP addresses?（）

• A、/24
• B、/30
• C、/27
• D、/26
• E、/32

第5题：

In the implementation of VLSM techniques on a network using a single Class C IP address,which subnet mask is the most efficient for point-to-point serial links?（）

• A、255.255.255.240
• B、255.255.255.254
• C、255.255.255.252
• D、255.255.255.0
• E、255.255.255.248

第6题：

In the implementation of VLSM techniques on a network using a single Class C IP address，which subnetmask is the most efficient for point-to-point serial links？（）

• A、255.255.255.240
• B、255.255.255.254
• C、255.255.255.252
• D、255.255.255.0
• E、255.255.255.248

第7题：

An IP address is 198.37.16.23.  Which of the following router’s IP addresses should be used to route traffic to the 193.130.56.0 network？（）

• A、193.130.56.0
• B、198.37.16.15
• C、198.130.16.15
• D、198.130.56.15

第8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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第13题：

When a DHCP server is configured, which two IP addresses should never be assignable to hosts? （）

• A、network or subnetwork IP address
• B、broadcast address on the network
• C、IP address leased to the LAN
• D、IP address used by the interfaces
• E、manually assigned address to the clients
• F、designated IP address to the DHCP server

第14题：

What is the purpose of a network mask?（）

• A、It is used to identify the maximum hop count of a subnetwork
• B、It is used to identify an IP address as either private or public
• C、It is used to identify the network to which an IP address belongs
• D、It is used to identify the total number of bits present in an IP address

第15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16题：

What is the advantage of using a multipoint interface instead of point-to-point subinterfaces when configuring a Frame Relay hub in a hub-and-spoke topology?（）

• A、it avoids split-horizon issues with distance vector routing protocols.
• B、IP addresses can be conserved if VLSM is not being used for subnetting.
• C、A multipoint interface offers greater security compared to point-to-point subinterface configurations.
• D、The multiple IP network addresses required for a multipoint interface provide greater addressing flexibility over point-to-point configurations.

第17题：

The network administrator is asked to configure 113 point-to-point links.Which IP addressing scheme best defines the address range and subnet mask that meet the requirement and waste the fewest subnet and host addresses?（）

• A、10.10.0.0/18 subnetted with mask 255.255.255.252
• B、10.10.0.0/25 subnetted with mask 255.255.255.252
• C、10.10.0.0/24 subnetted with mask 255.255.255.252
• D、10.10.0.0/23 subnetted with mask 255.255.255.252
• E、10.10.0.0/16 subnetted with mask 255.255.255.252

第18题：

Which of the following allows a technician to mask a private network of IP addresses behind onepublic IP address?（）

• A、NAT
• B、Subnetting
• C、DHCP
• D、DNS

第19题：

What is the purpose of a network mask?（）

• A、It is used to identify the maximum hop count of a subnetwork.
• B、It is used to identify an IP address as either private or public.
• C、It is used to identify the network to which an IP address belongs.
• D、It is used to identify the total number of bits present in an IP address.

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