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Network Systems 1 > Chapter 3 > Flashcards

Chapter 3 Flashcards

1
Q 
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
A

C) Framing

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2
Q 
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
A

A) Differentiated Services (DiffServ)

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3
Q 
A modern ASN consists of how many bits?
A) 16
B) 32
C) 64
D) 128
A

B) 32

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4
Q 
What netstat command option lists only current connections, including IP addresses and port numbers?
A) -s
B) -r
C) -n
D) -o
A

C) -n

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5
Q 
By default, the pathping command sends how many pings per hop?
A) 50
B) 100
C) 200
D) 500
A

B) 100

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6
Q 
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
A

D) BGP

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7
Q 
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
A

B) Layer 4

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8
Q 
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
A

B) sliding window

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9
Q

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

A

A) A router forwards broadcasts over the network

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10
Q 
The IP connectionless protocol relies on what other protocol to guarantee delivery of data>
A) UDP
B) ICMP
C) TCP
D) ARP
A

C) TCP

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11
Q 
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
A

D) show ip route

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12
Q 
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
A

C) -i

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13
Q 
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
A

A) checksum

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14
Q

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

A

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

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15
Q 
What IPv4 protocol handles multicasting for tasks such as videoconferencing or teleconferencing?
A) ICMP
B) ARP
C) TCP
D) IGMP
A

D) IGMP

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16
Q 
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
A

D) U

17
Q 
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
A

B) convergence time

18
Q 
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
A

B) link state

19
Q 
What address does ARP work in conjunction with IPv4 to discover? (2)
A) IP
B) MAC
C) ARP
D) physical
A

B) MAC

D) physical

20
Q 
Which of the following are types of entries an ARP table contains? (2)
A) Static
B) Flat
C) Basic
D) Dynamic
A

A) Static

D) Dynamic

21
Q 
What versions of the IP protocol are used on networks today?
A) IPv1
B) IPv4
C) IPv6
D) IPv5
A

B) IPv4

C) IPv6

22
Q 
Which layers of the OSI model are all routers able to interpret?
A) 1
B) 2
C) 3
D) 4
A

C) 3

D) 4

Network Systems 1 (6 decks)

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