CCNA Chapter 6

Refer to the exhibit. Fill in the blank. A packet leaving PC-1 has to traverse ____ hops to reach PC-4.

3

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.

Which two pieces of information are in the RAM of a Cisco router during normal operation?

Cisco IOS IP routing table

Refer to the exhibit. Match the packets with their destination IP address to the exiting interfaces on the router. Packets with destination 172.17.6.15

FastEthernet0/0

Refer to the exhibit. Match the packets with their destination IP address to the exiting interfaces on the router. Packets with destination 172.17.14.8

FastEthernet0/1

Refer to the exhibit. Match the packets with their destination IP address to the exiting interfaces on the router. Packets with destination 172.17.12.10

FastEthernet1/0

Refer to the exhibit. Match the packets with their destination IP address to the exiting interfaces on the router. Packets with destination 172.17.10.5

FastEthernet1/1

Match field names to the IP header where they would be found. IP v4 Header

Flags Total Length

Which two files, if found, are copied into RAM as a router with the default configuration register setting boots up?

IOS image file startup configuration

Which statement describes a hardware feature of a Cisco 1941 router that has the default hardware configuration?

It has two types of ports that can be used to access the console.

What is a service provided by the Flow Label field of the IPv6 header?

It informs network devices to maintain the same path for real-time application packets.

What are two types of router interfaces?

LAN WAN

Which two interfaces will allow access via the VTY lines to configure the router?

LAN interfaces WAN interfaces

Following default settings, what is the next step in the router boot sequence after the IOS loads from flash?

Locate and load the startup-config file from NVRAM.

Refer to the exhibit. Which route from the PC1 routing table will be used to reach PC2?

Network Destination: 192.168.10.0 Netmask: 255.255.255.0 Gateway: On-Link Interface: 192.168.10.10 Metric: 281

Which statement about router interfaces is true?

Once the no shutdown command is given, a router interface is active and operational. A configured and activated router interface must be connected to another device in order to operate.

What IPv4 header field identifies the upper layer protocol carried in the packet?

Protocol

Match the command with the device mode at which the command is entered. copy running-config startup-config

R1#

Match the configuration mode with the command that is available in that mode. copy running-config startup-config

R1#

Match the command with the device mode at which the command is entered. service password-encryption

R1(config)#

Match the configuration mode with the command that is available in that mode. interface fastethernet 0/0

R1(config)#

Match the command with the device mode at which the command is entered. ip address 192.168.4.4 255.255.255.0

R1(config-if)#

Match the command with the device mode at which the command is entered. login

R1(config-line)#

Match the configuration mode with the command that is available in that mode. login

R1(config-line)#

Match the command with the device mode at which the command is entered. enable

R1>

Match the configuration mode with the command that is available in that mode. enable

R1>

Fill in the blank In a router,_____ is the nonvolatile memory where the diagnostic software, the bootup instructions, and a limited IOS are stored.

ROM

Open the PT Activity. The enable password on all devices is cisco. Perform the tasks in the activity instructions and then answer the question. For what reason is the failure occurring?

SW1 does not have a default gateway configured.

Refer to the exhibit. Match the packets with their destination IP address to the exiting interfaces on the router. Packets with destination 172.17.8.20

Serial0/0/0

Refer to the exhibit. R1 receives a packet destined for the IP address 192.168.2.10. Out which interface will R1 forward the packet?

Serial0/0/1

Which characteristic describes an IPv6 enhancement over IPv4?

The IPv6 header is simpler than the IPv4 header is, which improves packet handling.

A router boots and enters setup mode. What is the reason for this?

The configuration file is missing from NVRAM.

A computer has to send a packet to a destination host in the same LAN. How will the packet be sent?

The packet will be sent directly to the destination host.

Open the PT Activity. Perform the tasks in the activity instructions and then answer the question or complete the task. Does the router have enough RAM and flash memory to support the new IOS?

The router has enough RAM and flash memory for the IOS upgrade.

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

Match field names to the IP header where they would be found. IP v6 Header

Traffic Class Flow Label

When a connectionless protocol is in use at a lower layer of the OSI model, how is missing data detected and retransmitted if necessary?

Upper-layer connection-oriented protocols keep track of the data received and can request retransmission from the upper-level protocols on the sending host.

After troubleshooting a router, the network administrator wants to save the router configuration so that it will be used automatically the next time that the router reboots. What command should be issued?

copy running-config startup-config

Which IPv4 header field is responsible for defining the priority of the packet?

differentiated services

What type of route is indicated by the code C in an IPv4 routing table on a Cisco router?

directly connected route

Which type of static route that is configured on a router uses only the exit interface?

directly connected static route

What are two characteristics of IP?

does not require a dedicated end-to-end connection operates independently of the network media

What is one advantage that the IPv6 simplified header offers over IPv4?

efficient packet handling

Which three commands are used to set up a password for a person who attaches a cable to a new router so that an initial configuration can be performed?

line console 0 login password cisco

Which three commands are used to set up secure access to a router through a connection to the console interface?

line console 0 login password cisco

What routing table entry has a next hop address associated with a destination network?

remote routes

Which two commands can be used on a Windows host to display the routing table?

route print netstat -r

A technician is configuring a router that is actively running on the network. Suddenly, power to the router is lost. If the technician has not saved the configuration, which two types of information will be lost?

routing table ARP cache

Which command displays a summary chart of all router interfaces, their IP addresses, and their current operational status?

show ip interface brief

During the process of forwarding traffic, what will the router do immediately after matching the destination IP address to a network on a directly connected routing table entry?

switch the packet to the directly connected interface

Which characteristic of the network layer in the OSI model allows carrying packets for multiple types of communications among many hosts?

the ability to operate without regard to the data that is carried in each packet

A technician is manually configuring a computer with the necessary IP parameters to communicate over the corporate network. The computer already has an IP address, a subnet mask, and a DNS server. What else has to be configured for Internet access?

the default gateway address

What is the purpose of the startup configuration file on a Cisco router?

to contain the commands that are used to initially configure a router on startup

When connectionless protocols are implemented at the lower layers of the OSI model, what are usually used to acknowledge the data receipt and request the retransmission of missing data?

upper-layer connection-oriented protocols

When would the Cisco IOS image held in ROM be used to boot the router?

when the full IOS cannot be found