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 - 172.16.3.48/26B.Network A - 172.16.3.128/25C.Network A - 172.16.3.192/26D.Link

第1题：

Which description regarding OSPF Network LSAs is correct?（）

• A、They are originated by Area Border Router and are sent into a single area to advertise an Autonomous System Border Router.
• B、They are originat ed by Area Border Routers and are sent into a single area to advertise destinations outside that area.
• C、They are originated by the DR on every multi - access network. They include all attached routers including the DR itself.
• D、They are originated by  every router in the OPSF network. They include all routers on the link, interfaces, the cost of the link, and any known neighbor on the link.

第2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：

Which two are characteristics of link-state routing protocols?（） (Choose two.)

• A、Routers choose a best path for a destination based on the SPF algorithm.
• B、All routers in a given area or level build a consistent database describing the network's topology.
• C、Routers choose the best path for a destination based on the interface on which they received the link stateadvertisement with the lowest cost.
• D、All routers in a given area or level forward link state advertisements between interfaces in the same area or level, adding their metric to the link state advertisement's cost information when they forward it.

第5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6题：

When HSRP is configured on a network, which two of these items are provided, which are sharedbetween the routers that run HSRP? （）(Choose two.)

• A、TCP-based hello packets
• B、the impact of flapping links if timers are too low
• C、a shared single interface
• D、the ability to track serial interfaces
• E、UDP-based hello packets

第7题：

A technician is setting up a network and wants to automatically assign IP addresses. Which of the following will need to be configured to automatically assign IP addresses？（）

• A、WINS
• B、DNS
• C、DHCP
• D、NTP

第8题：

A server is configured with two network cards. To utilize the band width of both network cards at the same time without assigning more than one IP address，which of the following load balancing techniques should be used？（）

• A、 Clustering
• B、 NIC teaming
• C、 OSPF
• D、 VLAN tagging

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第13题：

When HSRP is configured on a network, which two of these items are provided, which are shared between the routers that run HSRP ?（） (choose two)

• A、Shared single interface
• B、IP Address
• C、TCP-based hello packets
• D、MAC address

第14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15题：

Which three circumstances would prevent traceroute from displaying the WAN IP addresses? （）(Choose three)

• A、The WAN link is down.
• B、IPSec is enabled on the WX.
• C、Traceroute is enabled for compression.
• D、The network is configured using static routes.
• E、The local and remote cables are accidentally swapped.

第16题：

The network 172.25.0.0 has been divided into eight equal subnets. Which of the following IP addresses can be assigned to hosts in the third subnet if the ip subnet-zero command is configured on the router?（）

• A、172.25.78.243
• B、172.25.98.16
• C、172.25.72.0
• D、172.25.94.255
• E、172.25.96.17
• F、172.25.100.16

第17题：

Multicast is being deployed in the network， and only ip pim sparse-dense mode has been configured on all interfaces in the network to support a new video streaming application. No other multicast configuration was applied anywhere in the network. Since enabling multicast， the network monitoring tools show periodic spikes in link utilization throughout the network， even in areas where the video application is not being used. What could be a possible cause？（）

• A、PIM sparse mode is being used.
• B、PIM dense mode is being used.
• C、The BGP multicast address family has not been configured.
• D、IGMP version 3 is being used.
• E、IP PIM neighbor filters have not been applied.

第18题：

An etwork administrator has enabled OSPF across an NBMA network and has issued the command ip ospf network nonbroadcast. Given those facts, which two statements are true?（）

• A、Interfaces will automatically detect and build adjacencies with neighbor routers
• B、DR and BDR elections will not occur
• C、DR and BDR elections will occur
• D、The neighbor command is required to build adjacencies
• E、All routers must be configured in a fully meshed topology with all other routers

第19题：

A server is configured with two network cards. To utilize the bandwidth of both network cards at the same time without assigning more than one IP address, which of the following load balancing techniques should be used?（）

• A、Clustering
• B、NIC teaming
• C、OSPF
• D、VLAN tagging

第20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

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