CCNA Module 8-10
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.
Which three commands are used to set up secure access to a router through a connection to the console interface? (Choose three.)
1. line console 0 2. password <password> 3. login
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 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
What is the aim of an ARP spoofing attack?
to associate IP addresses to the wrong MAC address
Which statement describes a feature of the IP protocol?
IP relies on upper layer services to handle situations of missing or out-of-order packets.
What IPv4 header field identifies the upper layer protocol carried in the packet?
Protocol
Which two functions are primary functions of a router?
packet forwarding path selection
What are two functions of NVRAM? (Choose two.)
to retain contents when power is removed to store the startup configuration file
A network administrator is connecting a new host to the Payroll LAN. The host needs to communicate with remote networks. What IP address would be configured as the default gateway on the new host? RTR1(config)# interface gi0/1 RTR1(config-if)# description Connects to the Marketing LAN RTR1(config-if)# ip address 10.27.15.17 255.255.255.0 RTR1(config-if)# no shutdown RTR1(config-if)# interface gi0/0 RTR1(config-if)# description Connects to the Payroll LAN RTR1(config-if)# ip address 10.27.14.148 255.255.255.0 RTR1(config-if)# no shutdown
10.27.14.148
What happens when the transport input ssh command is entered on the switch vty lines?
Communication between the switch and remote users is encrypted.
Which destination address is used in an ARP request frame?
FFFF.FFFF.FFFF
What are the phases of the bootup process of a Cisco router?
Phase 1: Perform POST and load bootstrap program Phase 2: Locate and load Cisco IOS software Phase 3: Locate and load startup configuration file
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 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.
A router boots and enters setup mode. What is the reason for this?
The configuration file is missing from NVRAM.
What is the effect of using the Router# copy running-config startup-config command on a router?
The contents of NVRAM will change.
What will happen if the default gateway address is incorrectly configured on a host?
The host cannot communicate with hosts in other networks.
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.
Refer to the exhibit. The exhibit shows a small switched network and the contents of the MAC address table of the switch. PC1 has sent a frame addressed to PC3. What will the switch do with the frame?
The switch will forward the frame to all ports except port 4.
Which statement describes the treatment of ARP requests on the local link?
They are received and processed by every device on the local network.
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.
Which two types of IPv6 messages are used in place of ARP for address resolution?
neighbor solicitation neighbor advertisement
What are two services provided by the OSI network layer? (Choose two.)
routing packets toward the destination encapsulating PDUs from the transport layer
Refer to the exhibit. PC1 attempts to connect to File_server1 and sends an ARP request to obtain a destination MAC address. Which MAC address will PC1 receive in the ARP reply?
the MAC address of the G0/0 interface on R1
Which parameter does the router use to choose the path to the destination when there are multiple routes available?
the lower metric value that is associated with the destination network
Which term describes a field in the IPv4 packet header that contains a 4-bit binary value set to 0100?
version