Deck 3: How Data Is Transported Over Networks

Question 1

What command can be used on a Cisco router to view the routing table?

A)route print
B)netstat -r
C)route
D)show ip route

Answer 1

D

Question 2

What netstat command option lists only current connections,including IP addresses and port numbers?

A)-s
B)-r
C)-n
D)-o

Answer 2

C

Question 3

What happens when a router receives a packet with a TTL of 0?

A)The router attempts to forward the traffic on a local network
B)The router drops the packet and sends an ICMP TTL expired message back to the host.
C)The router resets the TTL to 128.
D)The router marks the packet as corrupted and forwards it to the next hop.

Answer 3

B

Question 4

What parameter can be combined with the traceroute command to instruct it to use ICMP echo requests instead of UDP datagrams?

A)-n
B)-p
C)-I
D)-d

Question 5

On IPv4 networks,IGMP operates at the Network layer of the OSI model to manage multicasting.

Question 6

What field in an IPv4 packet informs routers the level of precedence they should apply when processing an incoming packet?

A)Differentiated Services (DiffServ)
B)Internet header length (IHL)
C)Time to Live (TTL)
D)Padding

Question 7

What is NOT one of the three characteristics of TCP in its role as a reliable delivery protocol?

A)Connection-oriented Protocol
B)Sequencing and checksums
C)Framing
D)Flow Control

Question 8

By default,the pathping command sends how many pings per hop?

A)50
B)100
C)200
D)500

Question 9

What protocol replaces ARP,IGMP,and ICMPv4 on IPv6 based networks?

A)ARPng
B)BGPv6
C)IGMPv6
D)ICMPv6

Question 10

A modern ASN consists of how many bits?

A)16
B)32
C)64
D)128

Question 11

As a network support technician,you only need to know how to support IPv6.

Question 12

Which network routing protocol is a path vector protocol that sends updates between routers using TCP?

A)IS-IS
B)OSPF
C)RIP
D)BGP

Question 13

UDP provides error checking,but not sequencing.

Question 14

The IP connectionless protocol relies on what other protocol to guarantee delivery of data?

A)UDP
B)ICMP
C)TCP
D)ARP

Question 15

At what layer of the OSI model would a TCP or UDP header be added to a payload?

A)Layer 7
B)Layer 4
C)Layer 2
D)Layer 1

Question 16

In a TCP segment,what field indicates how many bytes the sender can issue to a receiver while acknowledgement for the segment is outstanding?

A)urgent pointer
B)sliding window
C)sequence number
D)URG flag

Question 17

Which of the following is not a task handled by a router?

A)A router forwards broadcasts over the network.
B)A router can reroute traffic if the path of first choice is down but a second path is available.
C)A router can interpret Layer 3 and often Layer 4 addressing.
D)A router can connect dissimilar networks.

Question 18

IP is an unreliable,connectionless protocol.

Question 19

What TCP field below allows the receiving node to determine whether a TCP segment is corrupted during transmission?

A)checksum
B)sliding window
C)acknowledgement number
D)TCP header length

Question 20

IPv4 and IPv6 use the same packet format.

Question 21

What type of routing protocol enables routers to communicate beyond neighboring routers,allowing each router to create a map of an entire network?

A)distance vector
B)link state
C)exterior gateway
D)map extension

Question 22

A _______ joins two or more networks and passes packets from one network to another.

Question 23

Which layers of the OSI model are all routers able to interpret?

A)1
B)2
C)3
D)4

Question 24

List some examples of routing metrics that might be used to determine the best path for data.

Question 25

What two fields below are used by IPv4 and IPv6 respectively to limit the number of times that a packet can be forwarded on a network?

A)hop limit
B)TTL
C)max path count
D)total time routing

Question 26

Describe the OSPF routing protocol.

Question 27

What address does ARP work in conjunction with IPv4 to discover?

A)IP
B)MAC
C)ARP
D)physical

Question 28

___'s lack of sophistication makes it more efficient thanTCP.

Question 29

What routing protocol criteria is defined as the time it takes to recognize a best path change in the event of a network outage?

A)administrative distance detection
B)convergence time
C)overhead calculation
D)downed path detection

Question 30

What is the difference between static and dynamic routing?

Question 31

Compare the three categories of routers.

Question 32

Describe the difference between dynamic ARP table entries and static ARP table entries.

Question 33

In IPv6,what field is used to indicate what sequence of packets from one source to one or multiple destinations a packet belongs to?

A)traffic class
B)group ID
C)flow label
D)traffic exchange

Question 34

ICMP (Internet Control Message Protocol)is a _______ layer core protocol that reports on the success or failure of data delivery.

Question 35

The TCP ___________________ is performed before TCP transmits the actual data.

Question 36

Which of the following are types of entries an ARP table contains?

A)Static
B)Flat
C)Basic
D)Dynamic

Question 37

The receiving host de-encapsulates the message at each layer in _______ order and then presents the payload to the receiving application.

Question 38

When viewing the routing table on a UNIX system,what flag indicates if a route is a usable route?

A)I
B)H
C)G
D)U

Question 39

What versions of the IP protocol are used on networks today?

A)IPv1
B)IPv4
C)IPv6
D)IPv5

Question 40

What IPv4 protocol handles multicasting for tasks such as videoconferencing or teleconferencing?

A)ICMP
B)ARP
C)TCP
D)IGMP

Question 41

Matching
Match each correct item with the statement below.
a.administrative distance
b.autonomous system number
c.gateway of last resort
d.gateway router
e.interior router
f.latency
g.MTU (maximum transmission unit)
h.neighbor discovery
i.probe
j.routing metric
A globally unique numberthat identifies an autonomous system.ASNs work similarlyto IP addresses that identify individual nodes on anetwork.Each ASN now consists of 32 bits instead of 16 bits,and they are assigned by IANA.

Question 42

Matching
Match each correct item with the statement below.
a.administrative distance
b.autonomous system number
c.gateway of last resort
d.gateway router
e.interior router
f.latency
g.MTU (maximum transmission unit)
h.neighbor discovery
i.probe
j.routing metric
The largest IP packetsize in bytes allowable by routers in a path without fragmentationand excluding the frame size.

Question 43

Matching
Match each correct item with the statement below.
a.administrative distance
b.autonomous system number
c.gateway of last resort
d.gateway router
e.interior router
f.latency
g.MTU (maximum transmission unit)
h.neighbor discovery
i.probe
j.routing metric
A router that connects an autonomous systemwith an outside network-for example,the router thatconnects a business to its ISP.

Question 44

Matching
Match each correct item with the statement below.
a.administrative distance
b.autonomous system number
c.gateway of last resort
d.gateway router
e.interior router
f.latency
g.MTU (maximum transmission unit)
h.neighbor discovery
i.probe
j.routing metric
A repeated trial message transmitted by the tracertand traceroute utilities to trigger routers along a route toreturn specific information about the route.

Question 45

Matching
Match each correct item with the statement below.
a.administrative distance
b.autonomous system number
c.gateway of last resort
d.gateway router
e.interior router
f.latency
g.MTU (maximum transmission unit)
h.neighbor discovery
i.probe
j.routing metric
The delay between the transmission of a signal andits receipt.

Question 46

Matching
Match each correct item with the statement below.
a.administrative distance
b.autonomous system number
c.gateway of last resort
d.gateway router
e.interior router
f.latency
g.MTU (maximum transmission unit)
h.neighbor discovery
i.probe
j.routing metric
A router that directs data between networkswithin the same autonomous system.

Question 47

Matching
Match each correct item with the statement below.
a.administrative distance
b.autonomous system number
c.gateway of last resort
d.gateway router
e.interior router
f.latency
g.MTU (maximum transmission unit)
h.neighbor discovery
i.probe
j.routing metric
Properties of a route used by routing protocolsto determine the best path to a destination when variouspaths are available.Routing metrics may be calculated usingany of several variables,including hop count,bandwidth,delay,MTU,cost,and reliability.

Question 48

Matching
Match each correct item with the statement below.
a.administrative distance
b.autonomous system number
c.gateway of last resort
d.gateway router
e.interior router
f.latency
g.MTU (maximum transmission unit)
h.neighbor discovery
i.probe
j.routing metric
The router on a network that acceptsall unroutable messages from other routers.

Question 49

Matching
Match each correct item with the statement below.
a.administrative distance
b.autonomous system number
c.gateway of last resort
d.gateway router
e.interior router
f.latency
g.MTU (maximum transmission unit)
h.neighbor discovery
i.probe
j.routing metric
A process whereby routers learn aboutall of the devices on their networks.On IPv4 networks,this process is managed by ARP with help from ICMP.On IPv6 networks,NDP (Neighbor Discovery Protocol)automatically detects neighboring devices and automaticallyadjusts when nodes fail or are removed from thenetwork.

Question 50

Matching
Match each correct item with the statement below.
a.administrative distance
b.autonomous system number
c.gateway of last resort
d.gateway router
e.interior router
f.latency
g.MTU (maximum transmission unit)
h.neighbor discovery
i.probe
j.routing metric
A number indicating a protocol'sreliability,with lower values being given higher priority.This assignment can be changed by a network administratorwhen one protocol should take precedence over a previouslyhigher-rated protocol on a network.