CCNA

1 Which statement is true about MAC addresses? 1. MAC addresses are implemented by software. 2.  A NIC only needs a MAC address if connected to a WAN. 3. The first three bytes are used by the vendor assigned OUI. 4. The ISO is responsible for MAC addresses regulations ANSWER: 3 2 What happens to runt frames received by a Cisco Ethernet switch? 1. The frame is dropped. 2. The frame is returned to the originating network device. 3.  The frame is broadcast to all other devices on the same network. 4. The frame is sent to the default gateway. ANSWER: 1 3 Which statement describes the treatment of ARP requests on the local link? 1. They must be forwarded by all routers on the local network. 2. They are received and processed by every device on the local network. 3. They are dropped by all switches on the local network. 4. They are received and processed only by the target device. ...

1 A collision fragment, also known as a ____frame, is a frame of fewer than 64 bytes in length. ANSWER:RUNT 2 Which two statements describe features or functions of the logical link control sublayer in Ethernet standards? (Choose two.) 1. Logical link control is implemented in software. 2. Logical link control is specified in the IEEE 802.3 standard. 3. The LLC sublayer adds a header and a trailer to the data. 4. The data link layer uses LLC to communicate with the upper layers of the protocol suite. 5. The LLC sublayer is responsible for the placement and retrieval of frames on and off the media. ANSWER: 1&4 3 What statement describes Ethernet? 1. It defines the most common LAN type in the world. 2. It is the required Layer 1 and 2 standard for Internet communication. 3. It defines a standard model used to describe how networking works. 4. It connects multiple sites such as routers located in...

1 What is contained in the trailer of a data-link frame? 1. logical address 2. physical address 3.  data 4. error detection ANSWER: 4                               2 What is true concerning physical and logical topologies? 1. The logical topology is always the same as the physical topology. 2. Physical topologies are concerned with how a network transfers frames. 3. Physical topologies display the IP addressing scheme of each network. 4. Logical topologies refer to how a network transfers data between devices ANSWER: 4 3 Which type of connector does a network interface card use? 1. DIN 2. PS-2 3. RJ-11 4. RJ-45 ANSWER:4 4 Which statement describes an extended star topology? 1. End devices connect to a central intermediate device, whic...

1 What are two services performed by the data link layer of the OSI model? (Choose two.) 1. It encrypts data packets. 2. It determines the path to forward packets. 3. It accepts Layer 3 packets and encapsulates them into frames. 4. It provides media access control and performs error detection. 5. It monitors the Layer 2 communication by building a MAC address table. ANSWER:3&4 2 Why are two strands of fiber used for a single fiber optic connection? 1. The two strands allow the data to travel for longer distances without degrading. 2. They prevent crosstalk from causing interference on the connection. 3. They increase the speed at which the data can travel. 4. They allow for full-duplex connectivity. ANSWER:4 3 A network administrator notices that some newly installed Ethernet cabling is carrying corrupt and distorted data signals. The new cabling was installed in the ceiling close to fluorescent lig...