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When comparing and contrasting the similarities and differences between bridges and
switches, which of the following are valid statements? Choose all the valid answer

A. Bridges are faster than switches because they have fewer ports. B. A switch is a
multiport bridge,
C. Bridges and switches learn MAC addresses by examining the source MAC address of
each frame received.
D. A bridge will forward a broadcast but a switch will not.
E. Bridges and switches increase the size of a collision domain. F. None of the above
statements are true.
Answer: B, C Explanation:
Both bridges and switches build the bridge table by listening to incoming frames and
examining the source MAC address in the frame.
Switches are multiport bridges that allow you to create multiple broadcast domains. Each
broadcast domain is like a distinct virtual bridge within a switch.
Incorrect Answers:

A. Switches are generally faster than bridges. Bridges also do not necessarily have fewer
ports than switches.
D. Both bridges and switches will forward broadcast and multicast traffic, assuming that
the traffic remains in the same VLAN.
E. The use of VLANs in a switch can decrease the size of the collision domain, by
creating additional, smaller collision domains.


Which of the following correctly describe the various functions and virtues of a router?
(Select all valid answer choices)

A. Packet switching
B. Collision prevention on a LAN segment. C. Packet filtering
D. Broadcast domain enlargement
E. Broadcast forwarding


F. Internetwork communication
G. None of the above
Answer: A, C, F Explanation:
The main function of a router is to connect different, separated networks together. In
doing so, switching packets from one network to another is a primary function, along

actually interpreting Ethernet header information. Routers can indeed be used to segment a network separate a collision domain. Path selection C. Unless bridging or IP helpers are configured on the router. a repeater is considered to operate at Layer 1. D. A router C. 640-802 QUESTION 6: Cisco is the leader in the router market space. whereas a switch performs OSI layer 2 functions. Hubs can be used to increase the number of stations that can be supported on a LAN. As an additional feature. Repeaters can be used to physically extend the LAN to greater distances. Which of the following are layer 1 devices that you can use? (Choose all that apply. A repeater Answer: D. A switch B. Bridging between LAN segments . repeating an electrical signal. A network adapter card D. However. Routers do not forward broadcast and multicast traffic out the additional interfaces by default. since routers do not forward LAN broadcasts and multicasts to other interfaces. QUESTION 5: The LAN needs are expanding at the Certifyme corporate office. but does examine and generate electrical signals. to make forwarding decisions.) A. The microsegmentation of broadcast domains B. routers are capable of providing filtering on a network address and application port level. Packet switching D. a hub actually performs OSI layer 1 functions. So. particularly addresses. Incorrect Answers: B. Routers actually segment LANs into smaller broadcast domains. You are instructed to enlarge the area covered by a single LAN segment on the Certifyme network. E Explanation: A hub simply repeats the electrical signal and makes no attempt to interpret the electrical signal (layer 1) as a LAN frame (Layer 2). LAN broadcasts are blocked at the router level.with providing for communication between networks. so choice C is also correct. A hub E. which is quickly growing. What basic functions do their routers perform in a network? (Choose two) A. Because the repeater does not interpret what the bits mean. routers alone can not prevent all collisions from occurring on any given LAN segment. E.

C. Access layer security F. E. D.E. Switches are primarily software based while bridges are hardware based. D. E. A CSU/DSU terminates an analog local loop. Both operates on Data link layer. A router is commonly considered a DCE device. QUESTION 9: . D Explanation: Layer 2 switching is considered hardware-based bridging because it uses specialized hardware called an application-specific integrated circuit (ASIC). Both bridges and switches make forwarding decisions based on Layer 2 addresses. 640-802 F. Bridges define broadcast domains while switches define collision domains. E. Generally bridges have two ports. Application optimization Answer: B. F QUESTION 8: As a network administrator. you will need to decide on the appropriate network devices to use. B. VLAN membership assignment G. C. F. A modem is used to terminate a T1 Answer: A. A router is commonly considered a DTE device. C. A modem terminates an analog local loop. Switches usually have higher port number then bridge. ASICs can run up to gigabit speeds with very low latency rates. QUESTION 7: Both bridges are switches are being used throughout the Certifyme LAN. Bridges are frequently faster than switches. B. Answer: B. C Explanation: The primary functions of a router are: Packet Switching and Path Selection. Which of the following correctly describes the roles of devices in a WAN? (Choose three) A. and switching that data as quickly as possible. Both bridges and switches forward Layer 2 broadcasts. It is the routers job to determine the best method for delivering the data. A CSU/DSU terminates a digital local loop. Which of the following statements are true regarding bridges and switches in this network? (Choose 3) A. A modem terminates a digital local loop. Switches usually have a higher number of ports than most bridges. G.

you can gather hardware and protocol information about neighbor devices. What are two reasons why the Certifyme network administrator would use CDP? (Choose two) A. D Explanation: Cisco Discovery Protocol (CDP) is a proprietary protocol designed by Cisco to help administrators collect information about both locally attached and remote devices. D: Switches are capable of filtering frames based on any Layer 2 fields. Increasing the size of broadcast domains C. . Decreasing the number of collision domains Answer: A. Thus. By using CDP. Allowing simultaneous frame transmissions B. To determine the status of network services on a remote device B. To support automatic network failover during outages Answer: B. Increasing the maximum length of UTP cabling between devices D. if you have a 100Mb half-duplex connection. To obtain the IP Address of a connected device in order to telnet to the device 640-802 C. switches usually can filter on this parameter. If you have a 100Mb full duplex connection. To verify the type of cable interconnecting two devices D.The Certifyme network administrator needs to determine what LAN devices to install on the Certifyme network. you can effectively get 200Mb out of the link because you could be sending 100Mb and receiving 100Mb at the same time. To determine the status of the routing protocols between directly connected routers G. QUESTION 10: CDP is being used throughout the Certifyme network. only sending at 100Mb OR receiving at 100Mb can happen at the same time. Furthermore. You can use: Show cdp neighbor Show cdp neighbor details Commands to gather the information of connected neighbors. Filtering frames based on MAC addresses E. Because link layer information often includes a reference to an upper-layer protocol. a switch can be programmed to reject (not forward) all frames sourced from a particular network. A full duplex connection is where both devices can send and receive at the same time. To verify Layer 2 connectivity between two devices when Layer 3 fails E. filters can be helpful in dealing with unnecessary broadcast and multicast packets. which is useful info for troubleshooting and documenting the network. D Explanation: A: A half duplex connection is where only one device can send or receive at a time. To obtain VLAN information from directly connected switches F. What are two advantages of using Layer 2 Ethernet switches over hubs? (Choose two) A. For example.

Because fiber is a dielectric material. Coaxial cable B. Interference immunity and lack of emissions are givens in FO systems and in the fiber medium itself. Route identifier E. Fiber optic cable C. Based on the information shown above. it’s not susceptible to electrical interference. What information is supplied by CDP? (Select three) A. as the distance limitation for 100M UTP Ethernet is 100 meters. Please study the exhibit carefully. None of the above Answer: B Explanation: Current Ethernet technology typically comes via either copper UTP or fiber cables. Neighbor traffic data Answer: A. QUESTION 13: Refer to the Certifyme network shown below: You work as a network technician at Certifyme . C Explanation: 640-802 QUESTION 12: Two Certifyme offices are connected as shown below: Two buildings on the London campus of a the Certifyme corporation must be connected to use Ethernet with a bandwidth of at least 100 Mbps. fiber would be a better fit as it is not prone to errors that could occur due to the voltage potential differences. B. what is needed to allow host 640-802 . UTP cable D. In this scenario the distance between the buildings is only 55 meters so either copper or fiber could be used. Platform D. FO-product vendors also claim that fiber systems make secure communications easier. Device Identifiers B. Capabilities list C. Which media type should be used for the connection? STP cable E.QUESTION 11: CDP is running between two Certifyme devices. However. Certifyme is concerned about possible problems from voltage potential differences between the two buildings.

QUESTION 14: Exhibit: A new Certifyme office is opening. one serial connection for the T1 and one Ethernet interface to connect to the switch on the LAN. you must know the various layers of the OSI model. and only a router can connect two different IP networks. and a network device needs to be installed in the place of the icon labeled Network Device to accommodate a leased line T1 to the Internet. A router with one Ethernet and one serial interface E. a crossover cable connecting the switches B. A switch with one Ethernet and one serial interface D. switch to router. a straight-through cable connecting the switches D. Since we need to insert a router for communication between the two switches. At which layers of the OSI Model do Wide Area Networks operate in? (Choose two) . host to switch. A router with one Ethernet and one modem interface F. a CSU/DSU connected to the switches with straight-through cables E. a router connected to the switches with straight-through cables Answer: E Explanation: Routers are Layers 3 devices used for inter-network communication. a backbone switch connecting the switches with either fiber optic or straight-through cables C. so both switches need to connect to a router using straight-through cables. In this scenario there are two different networks. A router with two Ethernet interfaces C. A straight-through cable is used to connect two different devices like. we will need a router with two interfaces. QUESTION 15: As a CCNA candidate. straight through cables will be used between the switches and the router. A switch with two Ethernet interfaces B. Here.Certifyme 1 to ping host Certifyme 2? A. None of the above Answer: D 640-802 Explanation: Only a router can terminate a leased line T1 access circuit. Which network device and interface configuration meets the minimum requirements for this installation? A.

” At which OSI layer is this problem associated with? A. ICMP helps control and manage IP’s work and therefore is considered part of TCP/IP’s network layer. WAN technologies generally function at the lower two layers of the OSI reference model: the physical layer and the data link layer as shown below. The session layer E. Reference: CCNA Self-Study CCNA ICND exam certification Guide (Cisco Press. such as telephone companies. Note: Occasionally WAN’s would also be considered to operate at layer 3. 640-802 QUESTION 16: While troubleshooting a connectivity problem on the network. Control message is the most descriptive part of a name. Presentation Layer G. The access layer D. The ICMP protocol provides a wide variety of information about a network’s health and operational status.A. ISBN 1-58720-083-X) page 277. but since this question asked for only 2 choices layers 1 and 2 are better choices. The data link layer B. Session Layer E. Application Layer Answer: A. Datalink Layer C. Physical Layer B. The application layer C. QUESTION 17: . Network Layer D. you issue the ping command from your PC command prompt. The network layer Answer: E Explanation: TCP/IP includes ICMP. but the output shows “request times out. a protocol designed to help manage and control the operation of a TCP/IP network. B Explanation: A WAN is a data communications network that covers a relatively broad geographic area and that often uses transmission facilities provided by common carriers. Transport Layer F.