ActualTests.Cisco.640-802.Exam.Q.and.A.08.15.08-DDU (1130589), страница 86
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The number of broadcast domains would increase.B. The number of broadcast domains would remain the same.C. The number of broadcast domains would decrease.D. The number of collision domains would increase.E. The number of collision domains would remain the same.F. The number of collision domains would decrease.Answer: B, DExplanation:Collision Domain: A group of Ethernet or Fast Ethernet devices in a CSMA/CD LANthat are connected by repeaters and compete for access on the network. Only one devicein the collision domain may transmit at any one time, and the other devices in the domainlisten to the network in order to avoid data collisions.
A collision domain is sometimesreferred to as an Ethernet segment.Broadcast Domain: Broadcasting sends a message to everyone on the local network(subnet). An example for Broadcasting would be DHCP Request from a Client PC. TheClient is asking for a IP Address, but the client does not know how to reach the DHCPServer. So the client sends a DHCP Discover packet to EVERY PC in the local subnetActualtests.com - The Power of Knowing640-802(Broadcast).
But only the DHCP Server will answer to the Request.How to count them?Broadcast Domain:No matter how many hosts or devices are connected together, if they are connected witha repeater, hub, switch or bridge, all these devices are in ONE Broadcast domain(assuming a single VLAN).
A Router is used to separate Broadcast-Domains (we couldalso call them Subnets - or call them VLANs).So, if a router stands between all these devices, we have TWO broadcast domains.Collision Domain:Each connection from a single PC to a Layer 2 switch is ONE Collision domain. Forexample, if 5 PCs are connected with separate cables to a switch, we have 5 Collisiondomains. If this switch is connected to another switch or a router, we have one collisiondomain more.If 5 Devices are connected to a Hub, this is ONE Collision Domain.
Each device that isconnected to a Layer 1 device (repeater, hub) will reside in ONE single collision domain.QUESTION 765:Network topology exhibit:Certkiller 3 configuration exhibit:Certkiller 4 configuration exhibit:You work as a network administrator at Certkiller .com. Study the exhibits carefully.Certkiller connects two different office segments, supporting two VLANs throughActualtests.com - The Power of Knowing640-802the two switches shown in the exhibit. Inter-VLAn communications is not required.The network is working properly and there is full connectivity. Certkiller needs toadd additional VLANs, so it has been decided to implement VTP.
Both switches areconfigured as VTP servers in the same VTP domain. VLANs added to Certkiller 3are not learned by Certkiller 4. Based on this information and the partialconfigurations in the exhibit, what is the problem?A. STP has blocked one of the links between the switches, limiting connectivity.B. Certkiller 4 should be configured as a VTP client.C. The links between the switches are access links.D. VTP is Cisco proprietary and requires a different trunking encapsulation.E. A router is required to route VTP advertisements between the switches.F. None of the above.Answer: CExplanation:A trunk link is a special connection; the key difference between an ordinary connection(access port) and a trunk port is that although an Access port is only in one VLAN at atime, a trunk port has the job of carrying traffic for all VLANs from one switch toanother. Any time you connect a switch to another switch and want to make sure that allVLANs will be carried across the switches, you want to make it a trunk.To carry on the data frames for all VLANs, you need to create the Trunk link on switchport as well as you need to select the encapsulation type.Switchport mode trunkSwitchport trunk encapsulation dot1q or islIn the above topology the switches are connected on access ports.
Making them trunkports should solve this issue.QUESTION 766:Network topology exhibit:Actualtests.com - The Power of Knowing640-802You work as a network administrator at Certkiller .com. You study the exhibitcarefully. The speed of all serial links is E1 and the speed of all Ethernet links is 100Mb/s. A static route will be established on the Certkiller 3 router to direct traffictoward the Internet over the most direct path available.
What configuration on theCertkiller 3 router will establish a route toward the Internet for traffic thatoriginates from workstations on the Certkiller Chicago Office LAN?A. ip route 0.0.0.0 255.255.255.255 172.16.100.2B. ip route 0.0.0.0 255.255.255.0 172.16.100.2C. ip route 0.0.0.0 0.0.0.0 172.16.100.2D. ip route 0.0.0.0 0.0.0.0 128.107.1.1E. ip route 0.0.0.0 0.0.0.0 172.16.100.1F. ip route 0.0.0.0 255.255.255.252 128.107.1.1Answer: CExplanation:We use default routing to send packets with a remote destination network not in therouting table to the next-hop router. You should generally only use default routing onstub networks-those with only one exit path out of the network.According to exhibit, all traffic towards Internet that originates from workstations shouldforward to Certkiller 4 Router.Syntax for default route is:ip route <Remote_Network> <Netmask> <Next_Hop_Address>.QUESTION 767:Exhibit:Actualtests.com - The Power of Knowing640-802You work as a network administrator at Certkiller .com.
You study the exhibitcarefully. Which two statements are true of the interfaces on Certkiller 1? Select two.A. A hub is connected directly to FastEthernet0/5.B. Inteface FastEthernet0/2 has been disabled.C. Multiple devices are connected directly to FastEthernet0/1.D. FastEthernet0/5 has statically assigned MAC addresses.E. FastEthernet0/1 is connected to a host with multiple network interface cards.F. FastEthernet0/1 is configured as a trunk link.Answer: A,FQUESTION 768:Three access points have been installed and configured to cover a small remoteCertkiller office. What term defines the wireless topology?A. SSIDB.
BSSC. ESSD. IBSSE. ASSF. None of the aboveActualtests.com - The Power of Knowing640-802Answer: CExplanation:A single wireless AP supporting one or multiple wireless clients is known as a BasicService Set (BSS). A set of two or more wireless APs connected to the same wirednetwork is known as an Extended Service Set (ESS).
An ESS is a single logical networksegment (also known as a subnet), and is identified by its SSIDSee the Figure:QUESTION 769:Exhibit:You work as a network administrator at Certkiller .com. You study the exhibitcarefully. A TCP/IP transfer is diagrammed in the exhibit. A window size of threehas been negotiated for this data transfer. Which message will be returned from thereceiver to the sender as part of this TCP/IP transfer?A. Send ACK 6B. Send ACK 3C. Send ACK 7D. Send ACK 1-3E. Send ACK 4Actualtests.com - The Power of Knowing640-802F.
Send ACK 4-6G. Send ACK 0Answer: EExplanation:TCP is knows as a reliable service. Reliable data delivery ensures the integrity of astream of data sent from one machine to the other through a fully functional data link. Itguarantees that the data won't be duplicated or lost. This is achieved through somethingcalled positive acknowledgment with retransmission a technique that requires a receivingmachine to communicate with the transmitting source by sending an acknowledgmentmessage back to the sender when it receives data.The sender documents each segment it sends and waits for this acknowledgment beforesending the next segment.
When it sends a segment, the transmitting machine starts atimer and retransmits if it expires before an acknowledgment is returned from thereceiving end. In this case, 3 segments were received, so the receiver sends back an ACKvalue of 4 as it is expecting the 4th segment next.QUESTION 770:Exhibit:You configure a new Certkiller switch as shown. Which two statements about theconfiguration of this switch interface are correct? (Select two)A.
A network host can be connected to this interface.B. The switchport belongs only to VLAN 2.C. The exhibit shows interface fa0/0 to be dynamically mapped to VLAN 2.D. Interface fa0/0 will be in both VLAN 1 (by default) and VLAN 2.E. This command is invalid as all access ports must reside in VLAN1.Answer: A, BExplanation:On a Cisco switch, ports are assigned to a single VLAN.
These ports are referred to asaccess ports and provide a connection for end users or node devices, such as a router orserver. By default all devices are assigned to VLAN 1, known as the default VLAN.After creating a VLAN, you can manually assign a port to that VLAN and it will be ableto communicate only with or through other devices in the VLAN. In this case, the porthas been manually assigned to VLAN 2, not the default value of VLAN 1.Mixed (20 questions)QUESTION 771:Actualtests.com - The Power of Knowing640-802What TCP/IP stack configuration features can DHCP provide, in addition to assigning anIP address? (Choose three.)A.
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