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networking > Module 8 Practice > Flashcards

Module 8 Practice Flashcards

1
Q

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

A

Transport layer

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2
Q

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

A

Data link layer

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2
Q

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

A

Fragmentation

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2
Q

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

A

Best Effort

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3
Q

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?

A

source IP address
destination IP address

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4
Q

Which statement is correct about IPv4 packet header fields?

A

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

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5
Q

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

A

Header Checksum

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6
Q

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

A

Protocol

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7
Q

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

A
  • IP address depletion
  • increased network complexity and Internet routing table expansion
  • lack of end-to-end connectivity
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8
Q

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

A
  • increased the IP address space
  • uses a simpler header to provide improved packet handling
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8
Q

Which is true of the IPv6 header?

A
  • it consists of 40 octets.
  • it contains 8 header fields.
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8
Q

Which is true of the IPv6 packet header?

A

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

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8
Q

Which statement about host forwarding decisions is true?

A

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

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9
Q

Which default gateway statement is true?

A

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

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10
Q

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

A
  • netstat -r
  • route print
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11
Q

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

A

show ip route

11
Q

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

A

a route learned dynamically from OSPF

12
Q

Which is a characteristic of static routes?

A

They are manually configured

13
Q

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

A

default route

14
Q

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

A

True

15
Q

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

A

netstat -r
(windows host)

16
Q

What information is added during encapsulation at OSI Layer 3?

A

source and destination IP address

17
Q

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

A

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

17
Q

How does the network layer use the MTU value?

A

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

17
Q

Which characteristic describes an IPv6 enhancement over IPv4?​

A

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

18
Q

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

A

to relieve IPv4 address depletion

18
Q

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

A

Destination Address

19
Q

Which statement accurately describes a characteristic of IPv4?

A

IPv4 has a 32-bit address space

20
Q

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

A

The packet will be sent directly to the destination host.

20
Q

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

A

destination IP address

21
Q

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

A

Hop Limit

22
Q

A router receives a packet from the Gigabit 0/0 interface and determines that the packet needs to be forwarded out the Gigabit 0/1 interface. What will the router do next?

A

create a new Layer 2 Ethernet frame to be sent to the destination

23
Q

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

A

127.0.0.1

networking (16 decks)

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