CCNAv7 Modules 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 and Network attackers could manipulate MAC address and IP address mappings in ARP messages with the intent of intercepting network traffic.
Which statement describes the treatment of ARP requests on the local link?
They are received and processed by every device on the local network.
Refer to the exhibit. Consider the IP address configuration shown from PC1. What is a description of the default gateway address?
It is the IP address of the Router1 interface that connects the PC1 LAN to Router1.
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.
Match the command with the device mode at which the command is entered. (Not all options are used.)
Login= R1(config-line)# Service password-encryption= R1(config)# IP address 192.168.4.4 255.255.255.0= R1(config-if)# Copy runnning-config startup-config= R1# Enable= R1>
Refer to the exhibit. A network administrator is connecting a new host to the Manager LAN. The host needs to communicate with remote networks. What IP address would be configured as the default gateway on the new host?Floor(config)# interface gi0/1 Floor(config-if)# description Connects to the Registrar LAN Floor(config-if)# ip address 10.118.63.65 255.255.255.0 Floor(config-if)# no shutdown Floor(config-if)# interface gi0/0 Floor(config-if)# description Connects to the Manager LAN Floor(config-if)# ip address 10.118.62.196 255.255.255.0 Floor(config-if)# no shutdown Floor(config-if)# interface s0/0/0 Floor(config-if)# description Connects to the ISP Floor(config-if)# ip address 10.62.63.254 255.255.255.0 Floor(config-if)# no shutdown Floor(config-if)# interface s0/0/1 Floor(config-if)# description Connects to the Head Office WAN Floor(config-if)# ip address 209.165.200.87 255.255.255.0 Floor(config-if)# no shutdown Floor(config-if)# end
10.118.62.196
Refer to the exhibit. 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 RTR1(config-if)# interface s0/0/0 RTR1(config-if)# description Connects to the ISP RTR1(config-if)# ip address 10.14.15.254 255.255.255.0 RTR1(config-if)# no shutdown RTR1(config-if)# interface s0/0/1 RTR1(config-if)# description Connects to the Head Office WAN RTR1(config-if)# ip address 203.0.113.39 255.255.255.0 RTR1(config-if)# no shutdown RTR1(config-if)# end
10.27.14.148
Refer to the exhibit. A network administrator is connecting a new host to the Store LAN. The host needs to communicate with remote networks. What IP address would be configured as the default gateway on the new host? HQ(config)# interface gi0/1 HQ(config-if)# description Connects to the Branch LAN HQ(config-if)# ip address 172.19.99.99 255.255.255.0 HQ(config-if)# no shutdown HQ(config-if)# interface gi0/0 HQ(config-if)# description Connects to the Store LAN HQ(config-if)# ip address 172.19.98.230 255.255.255.0 HQ(config-if)# no shutdown HQ(config-if)# interface s0/0/0 HQ(config-if)# description Connects to the ISP HQ(config-if)# ip address 10.98.99.254 255.255.255.0 HQ(config-if)# no shutdown HQ(config-if)# interface s0/0/1 HQ(config-if)# description Connects to the Head Office WAN HQ(config-if)# ip address 209.165.200.120 255.255.255.0 HQ(config-if)# no shutdown HQ(config-if)# end
172.19.98.230
Refer to the exhibit. A user PC has successfully transmitted packets to www.cisco.com. Which IP address does the user PC target in order to forward its data off the local network?
172.20.0.254
Refer to the exhibit. A network administrator is connecting a new host to the Store LAN. The host needs to communicate with remote networks. What IP address would be configured as the default gateway on the new host? HQ(config)# interface gi0/1 HQ(config-if)# description Connects to the Branch LAN HQ(config-if)# ip address 172.20.133.132 255.255.255.0 HQ(config-if)# no shutdown HQ(config-if)# interface gi0/0 HQ(config-if)# description Connects to the Store LAN HQ(config-if)# ip address 172.20.132.13 255.255.255.0 HQ(config-if)# no shutdown HQ(config-if)# interface s0/0/0 HQ(config-if)# description Connects to the ISP HQ(config-if)# ip address 10.132.133.254 255.255.255.0 HQ(config-if)# no shutdown HQ(config-if)# interface s0/0/1 HQ(config-if)# description Connects to the Head Office WAN HQ(config-if)# ip address 198.51.100.156 255.255.255.0 HQ(config-if)# no shutdown HQ(config-if)# end
172.20.132.13
Refer to the exhibit. A network administrator is connecting a new host to the Registrar LAN. The host needs to communicate with remote networks. What IP address would be configured as the default gateway on the new host? Main(config)# interface gi0/1 Main(config-if)# description Connects to the Service LAN Main(config-if)# ip address 172.29.157.156 255.255.255.0 Main(config-if)# no shutdown Main(config-if)# interface gi0/0 Main(config-if)# description Connects to the Engineering LAN Main(config-if)# ip address 172.29.156.36 255.255.255.0 Main(config-if)# no shutdown Main(config-if)# interface s0/0/0 Main(config-if)# description Connects to the ISP Main(config-if)# ip address 10.156.157.254 255.255.255.0 Main(config-if)# no shutdown Main(config-if)# interface s0/0/1 Main(config-if)# description Connects to the Head Office WAN Main(config-if)# ip address 198.51.100.177 255.255.255.0 Main(config-if)# no shutdown Main(config-if)# end
172.29.157.156
Refer to the exhibit. A network administrator is connecting a new host to the Service LAN. The host needs to communicate with remote networks. What IP address would be configured as the default gateway on the new host? Main(config)# interface gi0/1 Main(config-if)# description Connects to the Service LAN Main(config-if)# ip address 192.168.167.166 255.255.255.0 Main(config-if)# no shutdown Main(config-if)# interface gi0/0 Main(config-if)# description Connects to the Engineering LAN Main(config-if)# ip address 192.168.166.46 255.255.255.0 Main(config-if)# no shutdown Main(config-if)# interface s0/0/0 Main(config-if)# description Connects to the ISP Main(config-if)# ip address 10.166.167.254 255.255.255.0 Main(config-if)# no shutdown Main(config-if)# interface s0/0/1 Main(config-if)# description Connects to the Head Office WAN Main(config-if)# ip address 198.51.100.189 255.255.255.0 Main(config-if)# no shutdown Main(config-if)# end
192.168.167.166
Refer to the exhibit. A network administrator is connecting a new host to the Medical LAN. The host needs to communicate with remote networks. What IP address would be configured as the default gateway on the new host? BldgA(config)# interface gi0/1 BldgA(config-if)# description Connects to the Medical LAN BldgA(config-if)# ip address 192.168.191.189 255.255.255.0 BldgA(config-if)# no shutdown BldgA(config-if)# interface gi0/0 BldgA(config-if)# description Connects to the Client LAN BldgA(config-if)# ip address 192.168.190.70 255.255.255.0 BldgA(config-if)# no shutdown BldgA(config-if)# interface s0/0/0 BldgA(config-if)# description Connects to the ISP BldgA(config-if)# ip address 10.190.191.254 255.255.255.0 BldgA(config-if)# no shutdown BldgA(config-if)# interface s0/0/1 BldgA(config-if)# description Connects to the Head Office WAN BldgA(config-if)# ip address 198.51.100.213 255.255.255.0 BldgA(config-if)# no shutdown BldgA(config-if)# end
192.168.191.189
Refer to the exhibit. A network administrator is connecting a new host to the Medical LAN. The host needs to communicate with remote networks. What IP address would be configured as the default gateway on the new host? BldgA(config)# interface gi0/1 BldgA(config-if)# description Connects to the Medical LAN BldgA(config-if)# ip address 192.168.201.200 255.255.255.0 BldgA(config-if)# no shutdown BldgA(config-if)# interface gi0/0 BldgA(config-if)# description Connects to the Client LAN BldgA(config-if)# ip address 192.168.200.80 255.255.255.0 BldgA(config-if)# no shutdown BldgA(config-if)# interface s0/0/0 BldgA(config-if)# description Connects to the ISP BldgA(config-if)# ip address 10.200.201.254 255.255.255.0 BldgA(config-if)# no shutdown BldgA(config-if)# interface s0/0/1 BldgA(config-if)# description Connects to the Head Office WAN BldgA(config-if)# ip address 203.0.113.222 255.255.255.0 BldgA(config-if)# no shutdown BldgA(config-if)# end
192.168.201.200
Refer to the exhibit. A network administrator is connecting a new host to the Registrar LAN. The host needs to communicate with remote networks. What IP address would be configured as the default gateway on the new host?Floor(config)# interface gi0/1 Floor(config-if)# description Connects to the Registrar LAN Floor(config-if)# ip address 192.168.225.223 255.255.255.0 Floor(config-if)# no shutdown Floor(config-if)# interface gi0/0 Floor(config-if)# description Connects to the Manager LAN Floor(config-if)# ip address 192.168.224.103 255.255.255.0 Floor(config-if)# no shutdown Floor(config-if)# interface s0/0/0 Floor(config-if)# description Connects to the ISP Floor(config-if)# ip address 10.224.225.254 255.255.255.0 Floor(config-if)# no shutdown Floor(config-if)# interface s0/0/1 Floor(config-if)# description Connects to the Head Office WAN Floor(config-if)# ip address 203.0.113.246 255.255.255.0 Floor(config-if)# no shutdown Floor(config-if)# end
192.168.225.223
Refer to the exhibit. A network administrator is connecting a new host to the Registrar LAN. The host needs to communicate with remote networks. What IP address would be configured as the default gateway on the new host? Floor(config)# interface gi0/1 Floor(config-if)# description Connects to the Registrar LAN Floor(config-if)# ip address 192.168.235.234 255.255.255.0 Floor(config-if)# no shutdown Floor(config-if)# interface gi0/0 Floor(config-if)# description Connects to the Manager LAN Floor(config-if)# ip address 192.168.234.114 255.255.255.0 Floor(config-if)# no shutdown Floor(config-if)# interface s0/0/0 Floor(config-if)# description Connects to the ISP Floor(config-if)# ip address 10.234.235.254 255.255.255.0 Floor(config-if)# no shutdown Floor(config-if)# interface s0/0/1 Floor(config-if)# description Connects to the Head Office WAN Floor(config-if)# ip address 203.0.113.3 255.255.255.0 Floor(config-if)# no shutdown Floor(config-if)# end
192.168.235.234
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.
Where are IPv4 address to Layer 2 Ethernet address mappings maintained on a host computer?
ARP cache
What statement describes the function of the Address Resolution Protocol?
ARP is used to discover the MAC address of any host on the local network.
Why is NAT not needed in IPv6?
Any host or user can get a public IPv6 network address because the number of available IPv6 addresses is extremely large.
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 property of ARP causes cached IP-to-MAC mappings to remain in memory longer?
Entries in an ARP table are time-stamped and are purged after the timeout expires.
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.
Which destination address is used in an ARP request frame?
FFFF.FFFF.FFFF
When transporting data from real-time applications, such as streaming audio and video, which field in the IPv6 header can be used to inform the routers and switches to maintain the same path for the packets in the same conversation?
Flow Label
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.
Match the phases to the functions during the boot up process of a Cisco router. (Not all options are used.)
Phase 1: Perform the POST and load the bootstrap program Phase 2: Locate and load the CISCO IOS software Phase 3: Locate and load the startup configuration file
What IPv4 header field identifies the upper layer protocol carried in the packet?
Protocol
Match the configuration mode with the command that is available in that mode. (Not all options are used.)
R1(config-line)# = login R1# = copy running- config startup- config R1> = enable R1(config)# = interface fastethernet 0/0
Open the PT activity. Perform the tasks in the activity instructions and then answer the question.
R1: G0/0 and S0/0/0 R2: G0/1 and S0/0/0
Which term describes a field in the IPv4 packet header used to limit the lifetime of a packet?
TTL
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.
What information does the loopback test provide?
The TCP/IP stack on the device is working correctly.
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
Within a production network, what is the purpose of configuring a switch with a default gateway address?
The default gateway address is used to forward packets originating from the switch to remote networks.
What property of ARP causes the request to be flooded out all ports of a switch except for the port receiving the ARP request?
The destination MAC address FF-FF-FF-FF-FF-FF appears in the header of the Ethernet frame.
What property of ARP forces all Ethernet NICs to process an ARP request?
The destination MAC address FF-FF-FF-FF-FF-FF appears in the header of the Ethernet frame.
Under which two circumstances will a switch flood a frame out of every port except the port that the frame was received on? (Choose two.)
The frame has the broadcast address as the destination address and the destination address is unknown to the switch.
What will happen if the default gateway address is incorrectly configured on a host?
The host cannot communicate with hosts in other networks.
What property of ARP causes a reply only to the source sending an ARP request?
The source MAC address appears in the header of the Ethernet frame.
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.
What property of ARP causes the NICs receiving an ARP request to pass the data portion of the Ethernet frame to the ARP process?
The type field 0x806 appears in the header of the Ethernet frame.
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 field in the IPv4 header is used to prevent a packet from traversing a network endlessly?
Time-to-Live
What is a basic characteristic of the IP protocol?
connectionless
Which term describes a field in the IPv4 packet header that contains a unicast, multicast, or broadcast address?
destination IPv4 address
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
Which term describes a field in the IPv4 packet header that contains an 8-bit binary value used to determine the priority of each packet?
differentiated services
What is one advantage that the IPv6 simplified header offers over IPv4?
efficient packet handling
Which term describes a field in the IPv4 packet header used to detect corruption in the IPv4 header?
header checksum
Which three commands are used to set up secure access to a router through a connection to the console interface? (Choose three.)
line console 0, login, and password cisco
Which two types of IPv6 messages are used in place of ARP for address resolution?
neighbor solicitation and neighbor advertisement
Which two functions are primary functions of a router? (Choose two.)
packet forwarding and path selection
Which term describes a field in the IPv4 packet header used to identify the next level protocol?
protocol
Match the commands to the correct actions. (Not all options are used.)
provides security to Router(config-line)# password class displays a message when the router is accessed to ROuter(config)# banner motd # configures a name on the router to Router(config)# hostname CL1
A network administrator requires access to manage routers and switches locally and remotely. Match the description to the access method. (Not all options are used.)
remote access via a dialup connection to AUX preferred out-of-band access method to console remote access method that uses encryption to SSH unsecure remote access to Telnet
What routing table entry has a next hop address associated with a destination network?
remote routes
What are two services provided by the OSI network layer? (Choose two.)
routing packets toward the destination and encapsulating PDUs from the transport layer
Which term describes a field in the IPv4 packet header that contains a 32-bit binary value associated with an interface on the sending device?
source IPv4 address
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
What is the aim of an ARP spoofing attack?
to associate IP addresses to the wrong MAC address
What are two functions of NVRAM? (Choose two.)
to store the startup configuration file AND to retain contents when power is removed
Which term describes a field in the IPv4 packet header that contains a 4-bit binary value set to 0100?
version
