Ответы на CCNA1 (1130615), страница 4
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The small office LAN shown in the exhibit may eventually beconnected to the Internet. According to Cisco best practice, which IP network addressesshould be used?12.0.0.0172.0.0.0172.168.0.0192.32.17.0192.168.67.0225.1.5.0ENJOY!!! ^^Chapter 10 with 100%1Refer to the exhibit. Host A pings host B. When R4 accepts the ping into the Ethernetinterface, what two pieces of header information are included? (Choose two.)source IP address: 192.168.10.129source IP address: BBBB.3333.5677source MAC address: 5555.AAAA.6666destination IP address: 192.168.10.33destination IP address: 192.168.10.134destination MAC address: 9999.DADC.12342What header address information does a router change in the information it receivesfrom an attached Ethernet interface before information is transmitted out anotherinterface?only the Layer 2 source addressonly the Layer 2 destination addressonly the Layer 3 source addressonly the Layer 3 destination addressthe Layer 2 source and destination addressthe Layer 3 source and destination address3What is the primary purpose of the routing process?to propagate broadcast messagesto map IP addresses to MAC addressesto switch traffic to all available interfacesto map IP addresses to MAC addressesto find paths from one network or subnet to another4How does a router decide where the contents of a received frame should beforwarded?by matching destination IP addresses with networks in the routing tableby matching the destination IP address with IP addresses listed in the ARP tableby matching the destination MAC address with MAC addresses listed in the CAM tableby forwarding the frame to all interfaces except the interface on which the frame wasreceived5Refer to the exhibit.
A student in the Cisco network class has designed a small officenetwork to enable hosts to access the Internet. What recommendation should theteacher provide to the student in regards to the network design?Replace the Layer 2 switch with a hub.Replace the Layer 2 switch with a router.Replace the Layer 2 switch with a bridge.Replace the Layer 2 switch with a transceiver.6Which device would add security to a network by not forwarding broadcasts?hubrouterswitchbridgerepeater7What do switches and routers use to make forwarding decisions?Switches and routers both use IP addresses.Switches and routers use both MAC and IP addresses.Switches use IP addresses. Routers use MAC addresses.Switches use MAC addresses. Routers use IP addresses.Switches use MAC and IP addresses.
Routers use IP addresses.8At which layer of the OSI model does the device reside that is functioning as thedefault gateway for hosts on a network?Layer 1Layer 2Layer 3Layer 4Layer 5Layer 79Which type of routing uses manual entry of information and does not scale well inlarge internetworks?interiorexteriorstaticdynamic10Which type of routing allows routers to adapt to network changes?static routesdynamic routingonly default routesNo routing is necessary.11How does subnetting provide some level of security in a network?The number of switches must increase.The collisions prevent the copying of data.The broadcasts are contained within a subnet.The number of host IP addresses is increased.12What is the purpose of a subnet mask in a network?A subnet mask is not necessary when a default gateway is specified.A subnet mask is required only when bits are borrowed on a network.A subnet mask is used to determine in which subnet an IP address belongs.A subnet mask is used to separate the 48-bit address into the OUI and the vendorserial number.13Refer to the exhibit.
A newly hired technician is testing the connectivity of all hostsby issuing a ping command. The technician notices that a default gateway is notconfigured on all the hosts, but all hosts have connectivity between hosts, a factwhich seems to confuse the technician. How would you explain the connectivity tothe technician?The hosts are detecting the default gateway configured on the hub.The hosts are all in one LAN, so default gateway information is not needed.The hosts in the network only require that one host has a gateway configured.The hosts in the network would only need a gateway if a switch replaces the hub.The hosts are using broadcast to reach each other since no gateway is configured.14A company is using a Class B IP addressing scheme and expects to need as many as100 networks. What is the correct subnet mask to use with the networkconfiguration?255.255.0.0255.255.240.0255.255.254.0255.255.255.0255.255.255.128255.255.255.19215Company XYZ uses a network address of 192.168.4.0.
It uses the mask of255.255.255.224 to create subnets. What is the maximum number of usable hosts ineach subnet?614306216Refer to the exhibit. The network administrator has assigned the internetwork ofLBMISS an address range of 192.168.10.0. This address range has been subnettedusing a /29 mask. In order to accommodate a new building, the technician hasdecided to use the fifth subnet for configuring the new network. By company policies,the router interface is always assigned the first usable host address and theworkgroup server is given the last usable host address.
Which configuration shouldbe entered into the IP server properties to get connectivity to the network throughthe router?IP address: 192.168.10.38 Subnet mask: 255.255.255.240 Default gateway:192.168.10.39IP address: 192.168.10.38 Subnet mask: 255.255.255.240 Default gateway:192.168.10.33IP address: 192.168.10.38 Subnet mask: 255.255.255.248 Default gateway:192.168.10.33IP address: 192.168.10.39 Subnet mask: 255.255.255.248 Default gateway:192.168.10.31IP address: 192.168.10.254 Subnet mask: 255.255.255.0 Default gateway:192.168.10.117Refer to the exhibit.
Host A is connected to the LAN, but it cannot get access to anyresources on the Internet. The configuration of the host is shown in the exhibit. Whatcould be the cause of the problem?The host subnet mask is incorrect.The default gateway is a network address.The default gateway is a broadcast address.The default gateway is on a different subnet from the host.18Host A is connected to the LAN, but it cannot connect to the Internet.
The hostconfiguration is shown in the exhibit. What are the two problems with thisconfiguration? (Choose two.)The host subnet mask is incorrect.The host is not configured for subnetting.The default gateway is a network address.The default gateway is on a different network than the host.The host IP address is on a different network from the Serial interface of the router.19Refer to the exhibit.
A technician is planning an addressing scheme for a branchoffice as shown in the exhibit. What is the status of the intended network?The configuration will work as planned.The subnetwork mask of host A is incorrect.The default gateway of host A is a network address.The addresses on the router LAN interfaces are on the same subnetwork.The IP address of host A is on a different subnetwork than the subnetwork that theEthernet router interface is on.20Refer to the exhibit.
After host 2 is connected to the switch on the LAN, host 2 isunable to communicate with host 1. What is the cause of this problem?The subnet mask of host 2 is incorrect.Host 1 and host 2 are on different networks.The switch needs an IP address that is not configured.The router LAN interface and host 1 are on different networks.The IP address of host 1 is on a different network than is the LAN interface of therouter.21Refer to the exhibit. A network administrator is planning the addressing scheme forthe LAN using 172.25.14.0/26.
The hosts are to be assigned addresses 172.25.14.1– 172.25.14.25. The LAN interface of the router is to be configured using172.25.14.63 as the IP address. What would describe this addressing scheme?The LAN is being addressed properly.The subnet that is being assigned is not a usable subnet address.The router LAN interface is being assigned a broadcast address.The subnet mask does not allow enough host addresses in a single subnet.22An IP network address has been subnetted so that every subnetwork has 14 usablehost IP addresses.
What is the appropriate subnet mask for the newly createdsubnetworks?255.255.255.128255.255.255.224255.255.255.240255.255.255.248255.255.255.25223Which statements describe Layer 2 and Layer 3 packet address changes as thepacket traverses from router to router? (Choose two.)Layer 3 header is removed and replaced at every Layer 3 device.Layer 2 and Layer 3 addresses do not change when the packet traverse.Layer 3 source and destination addresses do not change when the packettraverse.Layer 2 frame header and trailer are removed and replaced at every Layer 3device.Layer 2 source and destination addresses do not change when the packet travels.24A company is planning to subnet its network for a maximum of 27 hosts. Whichsubnet mask would provide the needed hosts and leave the fewest unused addressesin each subnet?255.255.255.0255.255.255.192255.255.255.224255.255.255.240255.255.255.24825Given a host with the IP address 172.32.65.13 and a default subnet mask, to whichnetwork does the host belong?172.32.65.0172.32.65.32172.32.0.0172.32.32.0Chapter 11 with 100%1 What three pieces of information does the transport layer use to manage thecommunication of separate data streams between hosts? (Choose three.)port numberschecksum valuesauthentication keyssequence numbersencryption algorithmsacknowledgment numbers2 TCP is referred to as connection-oriented.
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