CCNA 1 Chapter 6 Exam

routing table code for candidate default

(*)

routing table code directly connected

C

routing table code EIGRP

D

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

Cisco IOS IP routing table

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 is the Differentiated Services (DS) field used for?

It is used to determine the priority of each packet.

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

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

The configuration file is missing from NVRAM.

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.

LAN interfaces

Used for connecting cables that terminate with LAN devices, such as computers and switches. This interface can also be used to connect routers to each other.

WAN interfaces

Used for connecting routers to external networks, usually over a larger geographical distance.

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.?

Routers with no next hop (they do not require going through another router to be reached.)

Directly-connected and local routes

What are two characteristics of IP (Internet Protocol)?

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

IOS image file startup configuration

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

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

Protocol

routing table code static

S

Two fields in the TCP header.

Sequence Number Acknowledgment Number

The function of the network layer protocols

Specifies the packet structure and processing used to carry the data from one host to another host. The actual communication data is encapsulated in the network layer PDU. The feature of its operation without regard to the data carried in each packet allows the network layer to carry packets for multiple types of communications.

Which characteristic describes an IPv6 enhancement over IPv4?

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

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 (TTL)

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

differentiated services*

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

line console 0* password Login

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

remote routes (The next hop IP address is the address of the router interface of the next device to be used to reach the destination network.)

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

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

The startup configuration file is stored in NVRAM

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

The IPv6 simplified header offers several advantages over IPv4:

· Better routing efficiency and efficient packet handling for performance and forwarding-rate scalability · No requirement for processing checksums · A Flow Label field for per-flow processing with no need to open the transport inner packet to identify the various traffic flows