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18 Cards in this Set
- Front
- Back
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Which statement is true about MAC addresses? |
- The first three bytes are used by the vendor assigned OUI. |
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What is a characteristic of a contention-based access method? |
- It is a nondeterministic method. |
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Which two statements describe features or functions of the logical link control sublayer in Ethernet standards? (Choose two.) |
- Logical link control is implemented in software. - The data link layer uses LLC to communicate with the upper layers of the protocol suite. |
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What is the purpose of the preamble in an Ethernet frame? |
- is used for timing synchronization |
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What is the Layer 2 multicast MAC address that corresponds to the Layer 3 IPv4 multicast address 224.139.34.56? |
- 01-00-5E-0B-22-38 |
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Which two statements are correct about MAC and IP addresses during data transmission if NAT is not involved? (Choose two.) |
- Destination and source MAC addresses have local significance and change every time a frame goes from one LAN to another. - Destination IP addresses in a packet header remain constant along the entire path to a target host. |
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What are two features of ARP? (Choose two.) |
- If a host is ready to send a packet to a local destination device and it has the IP address but not the MAC address of the destination, it generates an ARP broadcast. - If a device receiving an ARP request has the destination IPv4 address, it responds with an ARP reply. |
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Refer to the exhibit. PC1 issues an ARP request because it needs to send a packet to PC2. In this scenario, what will happen next? |
- PC2 will send an ARP reply with its MAC address. |
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A host is trying to send a packet to a device on a remote LAN segment, but there are currently no mappings in its ARP cache. How will the device obtain a destination MAC address? |
- It will send an ARP request for the MAC address of the default gateway. |
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What are two potential network problems that can result from ARP operation? (Choose two.) |
- On large networks with low bandwidth, multiple ARP broadcasts could cause data communication delays. - Network attackers could manipulate MAC address and IP address mappings in ARP messages with the intent of intercepting network traffic. |
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A network administrator is connecting two modern switches using a straight-through cable. The switches are new and have never been configured. Which three statements are correct about the final result of the connection? (Choose three.) |
- The link between the switches will work at the fastest speed that is supported by both switches. - The link between switches will work as full-duplex. - The auto-MDIX feature will configure the interfaces eliminating the need for a crossover cable. |
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A Layer 2 switch is used to switch incoming frames from a 1000BASE-T port to a port connected to a 100Base-T network. Which method of memory buffering would work best for this task? |
- shared memory buffering |
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When would a switch record multiple entries for a single switch port in its MAC address table? |
- when another switch is connected to the switch port |
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Which two statements describe a fixed configuration Ethernet switch? (Choose two.) |
- A fixed configuration switch may be stackable. - The number of ports on the switch cannot be increased. |
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How does adding an Ethernet line card affect the form factor of a switch? |
- by expanding the port density |
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A network administrator issues the following commands on a Layer 3 switch: DLS1(config)# interface f0/3 DLS1(config-if)# no switchport DLS1(config-if)# ip address 172.16.0.1 255.255.255.0 DLS1(config-if)# no shutdown DLS1(config-if)# end What is the administrator configuring? |
- a routed port |
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Which address or combination of addresses does a Layer 3 switch use to make forwarding decisions? |
- MAC and IP addresses |
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What statement illustrates a drawback of the CSMA/CD access method? |
- Collisions can decrease network performance. |
