Chapter 4 Flashcards Preview

Networking+ > Chapter 4 > Flashcards

Flashcards in Chapter 4 Deck (40)
Loading flashcards...
1

T or F: UDP provides error checking, but not sequencing.

F

2

T or F: IP is an unreliable, connectionless protocol, as it does not establish a session to send its packets.

T

3

T or F: IPv4 and IPv6 use the same packet format.

F

4

T or F: TCP uses a four-step process called a four-way handshake to establish a TCP connection.

F

5

T or F: The cost of upgrading infrastructure has been a major factor in the slow adoption of IPv6.

T

6

T or F: In general, a Layer 3 or Layer 4 switch is still optimized for fast Layer 2 data handling.

T

7

T or F: Routing Information Protocol (RIP) is an interior gateway protocol that uses a link-state algorithm.

F

8

T or F: The Border Gateway Protocol is considered to be a hybrid routing protocol.

T

9

T or F: The pathping utility sends 10 pings per hop by default.

F

10

T or F: The CTRL + S key combination can be used to stop an actively running command.

F

11

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

Framing
Connection-oriented Protocol
Sequencing and checksums
Flow Control

Framing

12

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

Internet header length (IHL)
Padding
Differentiated Services (DiffServ)
Time to Live (TTL)

Differentiated Services (DiffServ)

13

What command will list only current connections, including IP addresses and port numbers?
portstat
netstat -n
netstat -s
show ip stats

netstat -n

14

What utility is the equivalent to the pathping command on a Linux system?
tracepath
hping
traceroute
mtr

mtr

15

Which statement regarding the Border Gateway Protocol (BGP) is accurate?
BGP is limited to a single autonomous system.
BGP is exclusively a distance-vector protocol.
BGP is a more advanced version of OSPF.
BGP utilizes TCP for communicating updates.

BGP utilizes TCP for communicating updates.

16

In a TCP segment, what field indicates how many bytes the sender can issue to a receiver before acknowledgment is received?
PSH flag
urgent pointer
sliding-window
URG flag

sliding-window

17

Which of the following is not a task handled by a router?
A router can interpret Layer 3 and often Layer 4 addressing.
A router can reroute traffic if the path of first choice is down but a second path is available.
A router forwards broadcasts over the network.
A router can connect dissimilar networks.

A router forwards broadcasts over the network.

18

The IP connectionless protocol relies on what other protocol to guarantee delivery of data?
ICMP
TCP
UDP
ARP

TCP

19

You are connected to your network's Cisco router, and need to verify the route table. What command should you enter?
route print
route -a
show ip route
show route-table

show ip route

20

Which traceroute command will perform a trace using ICMP echo requests instead of UDP datagrams to the host srv1.mycompany.com?
traceroute -o ICMP srv1.mycompany.com
traceroute -w srv1.mycompany.com
traceroute -i srv1.mycompany.com
traceroute -I srv1.mycompany.com

traceroute -I srv1.mycompany.com

21

What is the purpose of the checksum TCP field?

It allows the receiving node to determine whether the TCP segment became corrupted during transmission.

It confirms receipt of data via a return message to the sender.

It specifies special options, such as the maximum segment size a network can handle.

It identifies the data segment's position in the stream of data segments being sent

It allows the receiving node to determine whether the TCP segment became corrupted during transmission.

22

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

The router marks the packet as corrupted and forwards it to the next hop.

The router attempts to forward the traffic on a local network.

The router drops the packet and sends an ICMP TTL expired message back to the host.

The router resets the TTL to 128.

The router drops the packet and sends an ICMP TTL expired message back to the host.

23

In IPv6, what field is used to indicate what sequence of packets from one source to one or multiple destinations a packet belongs to?
group ID
traffic exchange
traffic class
flow label

flow label

24

What is routing protocol convergence time defined as?

It is the time it takes for the protocol to recognize that a change has occurred.

It is the amount of time involved in configuration of the routing protocol.

It is the time it takes for the protocol to recognize the best path in the event of a network change.

It is the amount of time it takes after initial configuration of the protocol for all routes to become known.

It is the time it takes for the protocol to recognize the best path in the event of a network change.

25

Routing protocols that enable routers to communicate beyond neighboring routers, allowing each router to independently map the network, are known as which type of protocols?
interior gateway protocols
border gateway protocols
distance vector protocols
link-state protocols

link-state protocols

26

Which routing protocol started as a Cisco proprietary protocol and combines some of the features of a link-state protocol with that of distance-vector protocols?
BGP
IS-IS
OSPF
EIGRP

EIGRP

27

You have been tasked with the replacement of OSPF with EIGRP throughout your organization, which consists of a mixture of Cisco routers and routers from other vendors. What statement is accurate?
Convergence time will be increased with EIGRP.
EIGRP will increase CPU utilization on core routers.
EIGRP may not be available on non-Cisco routers.
Increased traffic will result from the switch to EIGRP.

EIGRP may not be available on non-Cisco routers.

28

What tcpdump command can be used to filter out all traffic except SSH traffic?
tcpdump port 22
tcpdump -p 22
tcpdump only ssh
tcpdump -f +ssh

tcpdump port 22

29

Which command will produce statistics about each message transmitted by a host, separated according to protocol type?
netstat -s
ipconfig -s
netstat -an
ipstat -a

netstat -s

30

When using the Routing Information Protocol (RIP), what is the maximum number of hops a message can take between its source and its destination before the destination is considered unreachable?
20
32
8
15

15