NET-125 Module 8-10 Exam

Which IPv4 address can a host use to ping the loopback interface?

127.0.0.1

Which statement regarding the service password-encryption command is true?

As soon as the service password-encryption command is entered, all currently set passwords are formerly displayed in plain text are encrypted

Which field in an IPv4 packet header will typically stay the same during its transmission?

Destination Address

Which destination address is used in an ARP request frame?

FFFF.FFFF.FFFF

Which field is used to detect corruption in the IPv4 header?

Header Checksum

Which field in an IPv6 packet is used by the router to determine if a packet has expired and should be dropped?

Hop Limit

Which three options are major issues associated with IPv4? (Choose three.)

IP address depletion, increased network complexity and Internet routing table expansion, lack of end-to-end connectivity

What type of information is contained in an ARP table?

IPv4 address to MAC address mappings

What addresses are mapped by ARP?

IPv4 address to a destination MAC address

Which statement accurately describes a characteristic of IPv4?

IPv4 has a 32-bit address space

Which two options are improvements provided by IPv6 as compared to IPv4? (Choose two.)

Increased the Ip address space, uses a simpler header to provide improved packet handling

Which is true of the IPv6 header?

It consists of 40 octets, it contains 8 header fields

What will a Layer 2 switch do when the destination MAC address of a received frame is not in the MAC table?

It forwards the frame out of all ports except for the port at which the frame was received

What is the purpose of the banner motd command?

It provides a way to make announcements to those who log in to a router

Which action is taken by a Layer 2 switch when it receives a Layer 2 broadcast frame?

It sends the frame to all ports except the port on which it received the frame

The ARP table in a switch maps which two types of address together?

Layer 3 address to a Layer 2 address

Which statement about host forwarding decisions is true?

Local hosts can reach each other without the need of a router

Which field includes common values such as ICMP (1), TCP (6), and UDP (17)?

Protocol

Which router component holds the routing table, ARP cache, and running configuration file?

RAM

An administrator is configuring a new router to permit out-of-band management access. Which set of commands will allow the required login using a password of cisco?

Router(config)#line console 0 Router(config-line)#password cisco Router(config-line)#login

Which command is used to encrypt all passwords in a router configuration file?

Router_A (config) # service password-encryption

Which is true of the IPv6 packet header?

The Hop Limit field replaces the IPv4 Time to Live field.

Which characteristic describes an IPv6 enhancement over IPv4?​

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

How does the network layer use the MTU value?

The MTU is passed to the network layer by the data link layer

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

The configuration file is missing from NVRAM

Which default gateway statement is true?

The default gateway address is the IP address of the router on the local network.

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

Which statement is correct about IPv4 packet header fields?

The source and destination IPv4 addresses remain the same while traveling from source to destination

A PC is configured to obtain an IPv4 address automatically from network 192.168.1.0/24. The network administrator issues the arp -a command and notices an entry of 192.168.1.255 ff-ff-ff-ff-ff-ff. Which statement describes this entry?

This is a static map entry

True or False? A router can be configured with a combination of both static routes and a dynamic routing protocol.

True

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 transmission from the upper-level protocols on the sending host

What does a code of "O" indicate next to a route in the routing table?

a route learned dynamically from OSPF

A technician is configuring a router to allow for all forms of management access. As part of each different type of access, the technician is trying to type the command login. Which configuration mode should be entered to do this task?

any line configuration mode

A cybersecurity analyst believes an attacker is spoofing the MAC address of the default gateway to perform a man-in-the-middle attack. Which command should the analyst use to view the MAC address a host is using to reach the default gateway?

arp -a

Which delivery method does not guarantee that the packet will be delivered fully without errors?

best effort

Which layer is responsible for taking an IP packet and preparing it for transmission over the communications medium?

data link layer

This type of route is also known as a gateway of last resort.

default route

When a router receives a packet, what information must be examined in order for the packet to be forwarded to a remote destination?

destination IP address

Which information is used by routers to forward a data packet toward its destination?

destination IP address

What are the two most commonly referenced fields in an IPv4 packet header that indicate where the packet is coming from and where it is going? (Choose two.)

destination IP address & source IP address

Company policy requires using the most secure method to safeguard access to the privileged exec and configuration mode on the routers. The privileged exec password is trustknow1. Which of the following router commands achieves the goal of providing the highest level of security?

enable secret trustknow1

What is the term for splitting up an IP packet when forwarding it from one medium to another medium with a smaller MTU?

fragmentation

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

netstat -r

Which two commands could be entered on a Windows host to view its IPv4 and IPv6 routing table? (Choose two.)

netstat -r, route print

What will be the response from the router after the command, "router(config)# hostname portsmouth" is entered?

portsmouth(config)#

Which CLI mode allows users to access all device commands, such as those used for configuration, management, and troubleshooting?

privileged EXEC mode

What is one function of the ARP protocol?

resolving an IPv4 address to a MAC address

Which command can be used on a Cisco router to display all interfaces, the IPv4 address assigned, and the current status?

show ip interface brief

What is the command used on a Cisco IOS router to view the routing table?

show ip route

What information is added during encapsulation at OSI Layer 3?

source and destination IP address

When an IPv4 packet is sent to a host on a remote network, what information is provided by ARP?

the MAC address of the router interface closest to the sending host

Which characteristic describes the default gateway of a host computer?

the logical address of the router interface on the same network as the host computer

What is stored in the NVRAM of a Cisco router?

the startup configuration

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

How does the ARP process use an IPv4 address?

to determine the MAC address of a device on the same network

What is the purpose of ARP in an IPv4 network?

to obtain a specific MAC address when an IP address is known

What was the reason for the creation and implementation of IPv6?

to relieve IPv4 address depletion

Which OSI layer sends segments to be encapsulated in an IPv4 or IPv6 packet?

transport layer

Which is a characteristic of static routes?

They are manually configured

Which two ICMPv6 messages are used during the Ethernet MAC address resolution process? (Choose two.)

router solicitation, neighbor advertisement