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Networkingina
pepe
| Question | Answer |
|---|---|
| A Layer 2 switch is used to switch incoming frames from a 1000BASE-T port to a port connected to a 100BaseT network. Which method of memory buffering would work best for this task? | shared memory buffering |
| A computer can access devices on the same network but cannot access devices on other networks. What is the probable cause of this problem? | The computer has an invalid default gateway address. |
| How do hosts ensure that their packets are directed to the correct network destination? | They have to keep their own local routing table that contains a route to the loopback interface, a local network route, and a remote default route |
| What action will occur if a switch receives a frame and does have the source MAC address in the MAC table? | The switch refreshes the timer on that entry |
| What are two examples of the cut through switching method? (Choose two.) | fast-forward switching fragment-free switching |
| What are two services provided by the OSI network layer? | routing packets toward the destination encapsulating PDUs from the transport layer |
| What information does the loopback test provide? | The TCP/IP stack on the device is working correctly. |
| What is a basic characteristic of the IP protocol? | connectionless |
| A network technician issues the arp -d * command on a PC after the router that is connected to the LAN is reconfigured. What is the result after this command is issued? | The ARP cache is cleared. |
| A new network administrator has been asked to enter a banner message on a Cisco device. What is the fastest way a network administrator could test whether the banner is properly configured? | Exit privileged EXEC mode and press Enter. |
| A router boots and enters setup mode. What is the reason for this? | The configuration file is missing from NVRAM |
| The global configuration command ip default-gateway 172.16.100.1 is applied to a switch. What is the effect of this command? | The switch can be remotely managed from a host on another network. |
| Under which two circumstances will a switch flood a frame out of every port except the port that the frame was received on? | The frame has the broadcast address as the destination address. The destination address is unknown to the switch. |
| What are two functions of NVRAM | to retain contents when power is removed to store the startup configuration file |
| What happens when the transport input ssh command is entered on the switch vty lines? | Communication between the switch and remote users is encrypted. |
| What important information is examined in the Ethernet frame header by a Layer 2 device in order to forward the data onward? | destination MAC address |
| What is the aim of an ARP spoofing attack? | to associate IP addresses to the wrong MAC address |
| What property of ARP causes cached IP-to-MAC mappings to remain in memory longer? | Entries in an ARP table are timestamped and are purged after the timeout expires. |
| What property of ARP allows MAC addresses of frequently used servers to be fixed in the ARP table? | A static IP-to-MAC address entry can be entered manually into an ARP table. |
| What property of ARP allows hosts on a LAN to send traffic to remote networks? | Local hosts learn the MAC address of the default gateway |
Created by:
roror