Deck 4: Data Link and Network Layer Protocols in Tcp/Ip

Question 1

A network is usually said to be converged when all the routers know a loop-free path to get to all other networks.

Answer 1

True

Question 2

When a packet is fragmented, all fragments are given different TTL values.

Answer 2

False

Question 3

Which of the following can summarize routing information before sending link-state packets to other networks?

A)Split horizons
B)Distance vectors
C)Backbone areas
D)Area border routers

Answer 3

D

Question 4

What do routers use in order to connect autonomous systems (ASs)?

A)distance vectors
B)exterior gateway protocols
C)agents
D)host routes

Question 5

Which of the following occurs on a network when ICMP is turned off and a router discards packets without sending any notification about its actions?

A)black hole
B)agent
C)link state
D)distance vector

Question 6

ARP is used to obtain the hardware address of the destination IP hosts.

Question 7

What type of routing protocol uses information about the distances between networks rather than the amount of time it takes for traffic to make its way from the source network to the destination network?

A)triggered
B)link-state
C)distance vector
D)split horizon

Question 8

Which of the following prevents a router from advertising a network on the same interface from which it learned that network?

A)System routing
B)Link state routing
C)On-demand routing
D)Split horizon

Question 9

If a packet with TTL=1 arrives at a router, the router must discard the packet because it cannot decrement the TTL to 0 and forward the packet.

Question 10

Routed protocols are Layer 1 protocols that are used to get packets through an internetwork.
Indicate the answer choice that best completes the statement or answers the question.

Question 11

Which of the following do routers use to select a routing path when there are multiple paths available?

A)tokens
B)precedence
C)Type of Service
D)repeaters

Question 12

Which of the following is a method that allows an IP host to use a simplified subnetting design?

A)Proxy ARP
B)Link Control
C)IPCP
D)IPCONFIG

Question 13

What is the recommended starting TTL value?

A)64
B)72
C)112
D)128

Question 14

In a RIPv2 packet, which field contains a plain text password?

A)Authentication
B)Route Tag
C)Next Hop
D)Address Family

Question 15

Two examples of routing protocols that support multiple types of services are OSPF and which of the following?

A)Border Gateway Protocol
B)T-carrier
C)TOS
D)IPCONFIG

Question 16

What is required to get the packet from one IP host to another IP host on a single network?

A)frame
B)hardware address
C)delimiter
D)data link

Question 17

What does a router use to determine which packet to send when several packets are queued for transmission from a single-output interface?

A)proxy ARP
B)precedence
C)preamble
D)frames

Question 18

IP fragmentation enables a larger packet to be automatically fragmented into smaller packets to cross a link that supports a smaller MTU. Which of the following devices performs this fragmentation?

A)token
B)router
C)repeater
D)cable modem

Question 19

All IPv4 packets have a predefined lifetime indicated in which field?

A)Time To Live
B)Frame Check Sequence
C)Protocol Identifier
D)Flag

Question 20

Which of the following terms best describes a compilation of information about all the networks that the router can reach?

A)host
B)routing table
C)black hole
D)agent

Question 21

Which of the following is a general-purpose protocol that provides WAN data link encapsulation services similar to those available for LAN encapsulations?

A)Border Gateway Protocol
B)Point-to-Point Protocol
C)Link Control Protocol
D)Token ring
Enter the appropriate word(s) to complete the statement.

Question 22

The method distance vector protocols use to prevent packets from endlessly circulating around a routing loop is called ____________________.

Question 23

Which configuration option allows a router to watch for traffic on its LAN that does not match its own IP address, so the router can add entries for that traffic in its ARP cache and routing table?

A)link-state
B)Local Area Mobility
C)intra-domain routing
D)external route entry

Question 24

At the Data Link layer, protocol data units are called ____________________.

Question 25

Match each item with a statement below.
a.internal route entry
b.areas
c.BGP
d.Link Control Protocol (LCP)
e.Point-to-Point Protocol over Ethernet (PPPoE)
f.ARP cache
g.hardware address
h.route resolution process
i.host route
a routing table entry with a 32-bit subnet mask designed to reach a specific network host

Question 26

Match each item with a statement below.
a.internal route entry
b.areas
c.BGP
d.Link Control Protocol (LCP)
e.Point-to-Point Protocol over Ethernet (PPPoE)
f.ARP cache
g.hardware address
h.route resolution process
i.host route
a temporary table in memory that consists of recent ARP entries

Question 27

Match each item with a statement below.
a.internal route entry
b.areas
c.BGP
d.Link Control Protocol (LCP)
e.Point-to-Point Protocol over Ethernet (PPPoE)
f.ARP cache
g.hardware address
h.route resolution process
i.host route
that process that a host undergoes to determine whether a desired destination is local or remote and, if remote, which next-hop router to use

Question 28

Match each item with a statement below.
a.internal route entry
b.areas
c.BGP
d.Link Control Protocol (LCP)
e.Point-to-Point Protocol over Ethernet (PPPoE)
f.ARP cache
g.hardware address
h.route resolution process
i.host route
groups of contiguous networks

Question 29

Protocols at which layer of the OSI model have the primary function of moving datagrams through an internetwork connected by routers?

A)Data link
B)Application
C)Network
D)Transport

Question 30

Match each item with a statement below.
a.internal route entry
b.areas
c.BGP
d.Link Control Protocol (LCP)
e.Point-to-Point Protocol over Ethernet (PPPoE)
f.ARP cache
g.hardware address
h.route resolution process
i.host route
the address of the NIC that is typically used as the data link address

Question 31

Match each item with a statement below.
a.internal route entry
b.areas
c.BGP
d.Link Control Protocol (LCP)
e.Point-to-Point Protocol over Ethernet (PPPoE)
f.ARP cache
g.hardware address
h.route resolution process
i.host route
a route entry learned from within the same area as the computing device

Question 32

The ____________________ field is a two-byte field that provides bit-level integrity checks for data as sent.

Question 33

Match each item with a statement below.
a.internal route entry
b.areas
c.BGP
d.Link Control Protocol (LCP)
e.Point-to-Point Protocol over Ethernet (PPPoE)
f.ARP cache
g.hardware address
h.route resolution process
i.host route
an interdomain routing protocol that replaces Exterior Gateway Protocol (EGP)

Question 34

The default TTL in Windows Server 2008, Windows Server 2012, Windows 7, and Windows 10 is which of the following?

A)64
B)72
C)112
D)128

Question 35

What method is used to obtain an IP address for an associated data link address?

A)Proxy ARP
B)IEEE
C)Network Control
D)RARP

Question 36

Match each item with a statement below.
a.internal route entry
b.areas
c.BGP
d.Link Control Protocol (LCP)
e.Point-to-Point Protocol over Ethernet (PPPoE)
f.ARP cache
g.hardware address
h.route resolution process
i.host route
a special connection negotiation protocol that PPP uses to establish point-to-point links between peers for ongoing communications

Question 37

Match each item with a statement below.
a.internal route entry
b.areas
c.BGP
d.Link Control Protocol (LCP)
e.Point-to-Point Protocol over Ethernet (PPPoE)
f.ARP cache
g.hardware address
h.route resolution process
i.host route
a protocol used by many Internet service providers to authenticate and manage broadband subscribers

Question 38

On a network that is low on available bandwidth, which of the following processes causes more traffic on the wire?

A)data encapsulation
B)error-detection
C)circuit switching
D)fragment retransmission

Question 39

____________________ is a technique for assigning costs to routes designed to prevent routing loops.

Question 40

____________________ system routing enables BGP peer routers to exchange routing information across an AS that does not support BGP.

Question 41

How do link-state routing protocols differ from distance vector routing protocols?

Question 42

The Target Hardware Address field indicates the desired target's hardware address, if known. In ARP requests, this field is typically filled with all 0s. In ARP replies, what should this field contain?

Question 43

Briefly discuss the following Ethernet II frame type fields and structures: Preamble, Destination Address Field, Source Address Field, and Type Field.

Question 44

What are the two most important jobs of the Data Link layer?

Question 45

Briefly describe each of the eight levels of precedence.

Question 46

WAN encapsulation of frames at the Data Link layer involves one or more services. Briefly discuss four of these services.

Question 47

Discuss three ways in which a router entry can be placed in a routing table.

Question 48

Briefly describe the following fields in the PPP header and trailer: Flag, protocol identifier, and Frame Check Sequence.

Question 49

Discuss the difference between the following ARP packet fields: Opcode field and the Protocol Type field.

Question 50

Provide a brief description of the two types of route table entries.