Читать книгу CCNP Enterprise Certification Study Guide: Implementing and Operating Cisco Enterprise Network Core Technologies - Ben Piper, David Higby Clinton - Страница 54

You can find the answers in the appendix.

1 Which of the following protocols operate at the Physical layer?HDLCIEEE 802.3PPPTwisted pair

2 What protocol operates at the Data Link layer?IPv4OSPFPPPUDP

3 What layer does ARP operate at?2347

4 Protocols at what layer provide for node-to-node data transfer over a shared medium?PhysicalData LinkNetworkTransport

5 What are two examples a single collision domain?A single fiber strand that carries separate light frequencies for sending and receivingWirelessTwo fiber strands, one for sending and another for receivingA twisted-pair cable with a single pair of wires for sending and receiving

6 What can be done to achieve full-duplex communication?Use fiber-optic cablesUse TCPUse different pairs of wires for transmitting and receivingSet the interface speeds to something greater than 10 Mbps

7 Workstation A is connected to a switch port that's in VLAN 10. Workstations B and C are connected switch ports in VLAN 20 on the same switch. Both workstations are configured with IP addresses in the 172.16.7.0/24 range. How many broadcast domains are there?01220

8 A server is connected to a switch. Both the server's network interface card (NIC) and the switch port are configured for full-duplex communication. How many collision domains are there?0123

9 What's the default global aging time for the MAC address table?30 seconds5 minutes1 hour4 hours

10 What occurs when the MAC address table is full?All entries in the table are deleted.The oldest entries are aged out.Frames addressed to a MAC address that's not in the table are flooded.Frames addressed to a MAC address that's not in the table are dropped.

11 What is an Ethernet interface MTU?The minimum size of an Ethernet frameThe maximum size of an Ethernet frameThe speed of an Ethernet interfaceThe maximum size of the Data field in an Ethernet frame

12 Which of the following is a function of a bridge?MAC-based routingIP-based routingConnecting two VLANs togetherReducing the size of a broadcast domain

13 What information does the MAC address table store? (Choose two.)IP addressVLANARP entriesInterface

14 What does ARP do?Maps MAC addresses to IP addressesMaps MAC addresses to interfacesMaps IP addresses to MAC addressesMaps IP addresses to interfacesMaps MAC addresses to VLANs

15 Client A in VLAN 3 has the IP address 172.16.3.3/24. Server A in VLAN 4 has the IP address 172.16.3.10/24. What will occur if client A attempts to ping Server A? (Choose two.)The ping will succeed.Client A will send an ARP request for 172.16.3.10.The ping will fail.Server A will send an ARP reply.

16 What destination address is an ARP request sent to?The MAC address 0000.0000.0000The MAC address FFFF.FFFF.FFFFThe MAC address 0100.5E01.0001The IP address 255.255.255.255

17 What destination address is an ARP reply sent to?The IP address that sourced the ARP request255.255.255.255FFFF.FFFF.FFFFThe MAC address that sourced the ARP request

18 What's the default ARP entry timeout on Cisco routers and switches?5 minutes1 hour4 hours6 hours

19 What's the purpose of TCP connection establishment?Error controlSynchronization of sequence numbersReservation of bandwidthSynchronization of polling intervals

20 What is the IP protocol number for TCP?161789