CCNA RS Back to Exams Page. 1. Which of the following OSI reference model layers do not have a direct mapping on the TCP/IP model? Session Presentation Transport NetworkQuestion 1 of 50 2. What are the three functions of the network layer in the OSI reference model? Defines how devices forward packets Defines how devices can have an address that can be used by the routing process Defines path determination done by the routing protocols to choose the best route Defines when a device can send data over a transmission mediumQuestion 2 of 50 3. Which protocols are present at the Transport layer? ICMP UDP TCP DNSQuestion 3 of 50 4. In the TCP/IP model, what is the encapsulated data at the transport layer called? Packet Segment Frame SectionQuestion 4 of 50 5. What is the correct order for the ethernet header and trailer fields? Preamble, Start Frame Delimiter, Type, Data, Destination MAC, Source MAC, Frame Check Sequence Preamble, Start Frame Delimiter, Type, Destination MAC, Source MAC, Data, Frame Check Sequence Preamble, Start Frame Delimiter, Source MAC, Destination MAC, Type, Data, Frame Check Sequence Preamble, Start Frame Delimiter, Destination MAC, Source MAC, Type, Data, Frame Check SequenceQuestion 5 of 50 6. What is the purpose of the Frame Check Sequence field in an Ethernet frame? Calculates the hash value of the Destination MAC and Source MAC fields from the Ethernet frame Calculates the hash value of the Data field from the Ethernet frame Provides a method for the Ethernet frame’s receiving device to check whether there were transmission errors that altered the content of the frame There is no such Frame Check Sequence field in an Ethernet frameQuestion 6 of 50 7. Which type of address indicates that traffic will be sent to a subset of all devices on the Ethernet LAN? Multicast address Broadcast address Anycast address Unicast addressQuestion 7 of 50 8. What is the minimum size of the data field of an Ethernet frame? There is no minimum size 64 bytes 46 bytes 1024 bytesQuestion 8 of 50 9. Assuming the connections between the router, the switch, and the host are Ethernet, what are the types of Ethernet cables needed to connect these three devices? Straight cable between ROUTER and SWITCH and crossover cable between SWITCH and HOST Straight cable between ROUTER and SWITCH and straight cable between SWITCH and HOST Crossover cable between ROUTER and SWITCH and crossover cable between SWITCH and HOST Crossover cable between ROUTER and SWITCH and straight cable between SWITCH and HOSTQuestion 9 of 50 10. Of the tables below, which shows the correct order of the seven layers of the OSI model? A B C DQuestion 10 of 50 11. What is the correct order of the standard HDLC packet fields? Flag, Control, Address Data, FCS Flag, Address, Control, Data, FCS Address, Flag, Data, Control, FCS Address, Control, Data, Flag, FCSQuestion 11 of 50 12. Which is the HDLC header added by the Cisco proprietary implementation of HDLC? Flag Control Type IdentifierQuestion 12 of 50 13. Which one(s) of these following examples are Internet Access Links? Leased Line HDLC DSL CableQuestion 13 of 50 14. What does Ethernet over MPLS(EoMPLS) provide? Speeds of up to 10 Mbps between two devices A point-to-point connection between two devices An Ethernet segment emulation between two devices Data confidentiality and encryption between two devicesQuestion 14 of 50 15. Assuming the below packet is a Cisco HDLC packet, what field is missing from the packet? Start Frame Delimiter Padding Control Source AddressQuestion 15 of 50 16. What is the purpose of Address Resolution Protocol? To identify the next-hop interface To dynamically learn the data link address of an IP host connected to an Ethernet link To find the corresponding IP address of a MAC address To find the DLCI of a PVC in a Frame-Relay networkQuestion 16 of 50 17. What is the size of an IPv4 address? 64 bits 16 bits 32 bits 24 bitsQuestion 17 of 50 18. Which of the following IP addresses falls into a class B network? 172.172.172.1/16 200.200.200.1/24 150.150.150.1/16 20.20.20.1/8Question 18 of 50 19. What is a valid network numbers range for class C? 128.0.0.0 to 172.255.0.0 128.0.0.0 to 191.255.0.0 192.0.0.0 to 239.255.255.0 192.0.0.0 to 223.255.255.0Question 19 of 50 20. What is the purpose of IP subnetting? Defines a flexible method to take a single Class A, B, or C IP network and further subdivide it into smaller groups of consecutive IP addresses Defines a method to consolidate multiple consecutive subnets into a single network Defines a method to increase the number of possible hosts on a network Defines a method to increase the size of the broadcast domain in an Ethernet segmentQuestion 20 of 50 21. Which of the following tables contain the correct valid network numbers for Class A, B, and C? A B C DQuestion 21 of 50 22. What is the two-step logic that a host uses to send a packet? If the destination IP address is in the same IP subnet as the host, send the packet directly to that destination host If the destination IP address is in the same IP subnet as the host, send the packet to the default gateway If the destination IP address is not in the same IP subnet as the host, send the packet to the default gateway If the destination IP address is not in the same IP subnet as the host, drop the packetQuestion 22 of 50 23. What does a router do with a packet whose destination data link address does not belong to the router? The router changes the data link destination address and processes the packet The router sends the packet back to the source The router forwards the packet to its destination The router drops the packetQuestion 23 of 50 24. What are two of the steps a router takes when it receives a packet whose destination data link address is the router? Forwards the packet as it is Changes the source IP address of the packet with its own IP address and then forwards the packet Compares the IP packet’s destination IP address to the routing table and finds the route that best matches the destination address Discards the old data link header and trailer, leaving the IP packetQuestion 24 of 50 25. What are two of the goals of a routing protocol? To dynamically learn and fill the routing table with a route to each subnet in the network To increase the router CPU load due to the computing needed to calculate the best possible routes To place the best route in the routing table If more than one route to a subnet is available To fill up the router memory with the routes for each subnet in the networkQuestion 25 of 50 26. What are two of the goals of a routing protocol? To remove the routes that are in the routing table for more than 24 hours To remove the routes for which there aren’t at least two possible next-hops To prevent routing loops To notice when routes in the table are no longer valid and to remove them from the routing table; if another route through another neighboring router is available, to add the route to the routing tableQuestion 26 of 50 27. Which two statements are true with regards to ARP Request and ARP Reply? ARP Reply destination MAC address is broadcast ARP Reply destination MAC address is unicast ARP Request destination MAC address is broadcast ARP Request destination MAC address is unicastQuestion 27 of 50 28. Which of the following is not a function of the TCP/IP Transport layer? Flow control using windowing IP packets fragmentation Ordered data transfer and data segmentation Connection establishment and terminationQuestion 28 of 50 29. The message created by TCP that begins with the TCP header, followed by any application data, is called? TCP frame TCP stream TCP segment TCP flowQuestion 29 of 50 30. Which of the following is not a component of a socket? An IP address A transport protocol A MAC address A port numberQuestion 30 of 50 31. What is the transport protocol and the port number of a www application? TCP, port 80 TCP, port 21 UDP, port 80 UDP, port 21Question 31 of 50 32. Which of the following tables contain the correct port number/protocol/application combinations? A B C DQuestion 32 of 50 33. What is the correct order of the packets required to establish a TCP connection? SYN, ACK SYN, SYN+ACK, ACK SYN, ACK, ESTABLISH SYN, ESTABLISHQuestion 33 of 50 34. Looking at the diagram below, what should be the last packet exchanged before the TCP connection can be established? ESTABLISH, DP=80, SP=3000 FIN, DP=80, SP=3000 ACK, DP=80, SP=3000 CLOSE, DP=80, SP=3000Question 34 of 50 35. The primary function of a switch is to forward frames. What is the parameter a switch uses to decide where to forward a frame? The source IP address The destination MAC address The destination IP address The source MAC addressQuestion 35 of 50 36. How does a switch populate its MAC address table? By learning the source IP address of each frame received By learning the destination MAC address of each frame received By learning the source MAC address of each frame received By learning the destination IP address of each frame receivedQuestion 36 of 50 37. What kind of frames are flooded by a switch? Unknown unicast frames Broadcast frames Multicast frames Known unicast framesQuestion 37 of 50 38. What does a switch do with a frame whose destination MAC address is not in the MAC address table? It sends the frame on all interfaces It sends the frame on all interfaces except the one from where it came It drops the frame It stores the frame until the destination MAC address is learnedQuestion 38 of 50 39. Considering the diagram and the MAC address table of the switch below, on which interface will the switch forward a frame that is coming from PC2 and is destined for MAC address 3333.3333.3333? Gi0/1 Gi0/2 Gi0/3 Gi0/4Question 39 of 50 40. Considering the diagram and the MAC address table of the switch below, on which interface will the switch forward a frame that is coming from PC1 and is destined for MAC address 4444.4444.4444? Gi0/1 Gi0/2 Gi0/3 Gi0/4Question 40 of 50 41. The type of forwarding that occurs when a switch starts to forward the frame after the first 64 bytes of the frame is called? Store-and-forward Cut-through Fragment-free Rapid-forwardQuestion 41 of 50 42. What is the disadvantage of using the cut-through forwarding method? The latency increases The method does not allow the switch to discard the frames that fail the FCS check The method doesn’t work when the switch is using speeds higher than 10 Gbps The method doesn’t work when the switch is using speeds higher than 1 GbpsQuestion 42 of 50 43. What is the purpose of Spanning Tree Protocol? To increase the number of the active paths that can exist between any pair of LAN segments To prevent looping frames by not forwarding the broadcast and unknown unicast frames To prevent looping frames by blocking some ports from forwarding frames so that only one active path exists between any pair of LAN segments To prevent looping frames by forwarding only known unicast framesQuestion 43 of 50 44. In what way is a switch different from a hub? The switch decreases the number of the broadcast domains The switch tracks the MAC addresses of the devices The switch doesn’t allow devices with different Ethernet speeds to communicate through the switch The switch doesn’t support full-duplex communicationQuestion 44 of 50 45. What device will increase the number of the broadcast domains? A bridge A hub A switch A routerQuestion 45 of 50 46. Which of the following doesn’t create multiple collision domains? A switch A router A hub A bridgeQuestion 46 of 50 47. How can a switch be made to create multiple broadcast domains? By putting some interfaces in one VLAN and other interfaces in another VLAN By not forwarding broadcast frames By enabling Spanning Tree Protocol By being able to support full-duplex communicationQuestion 47 of 50 48. Which two of the following statements are true? A collision domain is a set of NICs for which a broadcast frame sent by one NIC is received by all other NICs in the same collision domain A collision domain is a set of NICs for which a frame sent by one NIC could result in a collision with a frame sent by any other NIC in the same collision domain A broadcast domain is a set of NICs for which a broadcast frame sent by one NIC is received by all other NICs in the same broadcast domain A broadcast domain is a set of NICs for which a frame sent by one NIC could result in a collision with a frame sent by any other NIC in the same broadcast domainQuestion 48 of 50 49. How many broadcast domains should be present in the below diagram? 9 3 4 7Question 49 of 50 50. In campus design terminology, what is the name of Switch 3, Switch 4, and Switch 5? Distribution switches Core switches Access switches Layer 2 switchesQuestion 50 of 50 Loading…
