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Network Fundamentals Flashcards

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1
Q

What is the valid IP address range that can be assigned to hosts on the subnet that includes the address 172.16.4.6/23?

A

172.16.4.1 - 172.16.5.254

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2
Q

What is the size of the Acknowledgement Number field in a TCP packet header?

A

32 bits

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3
Q

Which Cisco IOS command allows you to change the packet load and other ICMP parameters to test the connectivity to a remote device?

A

Extended ping

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4
Q

Which OSI Layer 3 devices are used to segregate a network into separate broadcast domains?

A

routers

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5
Q

Which protocol requires the receiving station to acknowledge the receipt of packets: Transmission Control Protocol (TCP) or User Datagram Protocol (UDP)?

A

Transmission Control Protocol (TCP)

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6
Q

What is the range of Private address for Class C IP addresses?

A

192.168.0.0 to 192.168.255.255

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7
Q

At which OSI layer does the Internet Protocol (IP) operate?

A

Layer 3 - network layer

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8
Q

Which protocol is connection-oriented: Transmission Control Protocol (TCP) or User Datagram Protocol (UDP)?

A

Transmission Control Protocol (TCP)

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9
Q

At which OSI Layer does the FTP protocol operate?

A

Layer 7 - application layer

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10
Q

In situations where the same subnet mask must be used for multiple interfaces on a router, what principle should guide thy selection of the mask?

A

The mask must provide capacity sufficient for the largest number of hosts on any single interface while also providing the required number of subnets

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11
Q

In general, crossover cables are used between like devices and straightthrough cables between unlike devices. What is the one exception to this rule?

A

When connecting an Ethernet interface on a router to a computer NIC, a crossover cable is used.

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12
Q

What would be the broadcast address if the IP address given is 172.28.23.2 and the subnet mask is 255.255.240.0?

A

172.28.31.255

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13
Q

What is the name of one data unit at the OSI transport layer?

A

a segment

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14
Q

Which OSI Layer 2 devices provide software-based switching of LAN traffic?

A

LAN Bridges

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15
Q

Which TCP port does telnet use to communicate with other hosts?

A

TCP port 23

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16
Q

Which type of cable is used to connect the console port on the switch to a terminal?

A

a rollover console cable

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17
Q

What is the size of the Source field or Destination field in a TCP packet header?

A

16 bits

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18
Q

How many valid host IP addresses are available in the subnet with IP address 172.16.5.2/23?

A

510

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19
Q

What would be the subnet ID if the IP address is 172.28.23.2, the maximum number of hosts per subnet is 254, and the maximum number of subnets possible is 256?

A

172.28.23.0

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20
Q

Which port is used by Simple Network Management Protocol (SNMP) to communicate with other hosts?

A

UDP port 161

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21
Q

Which protocol has less packet overhead: Transmission Control Protocol (TCP) or User Datagram Protocol (UDP)?

A

User Datagram Protocol (UDP)

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22
Q

Which OSI layer uses IP addresses to communicate with hosts?

A

Layer 3 - network layer

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23
Q

Which type of connector is used to connect a Category 5 Ethernet cable to the 10/100 Ethernet port on the switch?

A

an RJ-45 connector

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24
Q

Which one, bridges or switches, allows cut-through as well as store and forward internal processing?

A

switches

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25
What is the term used for the Transmission Control Protocol (TCP) error recovery and windowing process?
Positive Acknowledgement and Retransmission (PAR)
26
Which TCP packet header field contains the control information used for connection establishment?
the Flags field
27
What should be the default gateway for a host that needs to access a server on a network across the local router?
IP address of the local interface of the router.
28
What would be the last usable host IP address in the 192.168.16.64/26 subnet?
192.168.16.126
29
Which cable is used on a router's wide area network (WAN) interface to connect to the serial ports?
Serial cable
30
Which two Unshielded Twisted Pair (UTP) cable categories support Gigabit Ethernet?
UTP categories Cat 5 and Cat 6
31
Which cable type is the copper-wire LAN cabling standard defined by the Telecommunications Information Association (TIA)?
Unshielded Twisted Pair (UTP)
32
Which command would you use to determine if all seven layers of OSI reference model are operational between a local and remote host, and gain login access to the remote host?
telnet
33
What is the name given to the protocol data unit (PDU) at the transport layer?
segment
34
What is the possible IP range that can be assigned to hosts on the subnet that includes the address 192.168.144.34/29?
192.168.144.33 - 192.168.144.38
35
Which port on the switch connects to a 10BaseT port on a hub using a crossover cable?
the 10/100 Ethernet port
36
The IP address 192.168.5.0/24 is reserved and cannot be given to a host. What is this address called?
network ID
37
How many hosts per subnet can be accommodated with IP address 192.168.2.1 and subnet mask 255.255.255.224?
30
38
Which OSI layered troubleshooting approach would you use if you are unable to ping a remote router from local router and the show interfaces command displays interface up and protocol up?
divide and conquer
39
Which OSI Layer 4 protocol uses port 23 for the telnet command to connect to remote host?
Transmission Control Protocol (TCP)
40
Which type of Ethernet cable is used to connect the 10/100 port on the switch to another switch?
a crossover cable
41
Which UDP port does Trivial File Transfer Protocol (TFTP) use to communicate with other hosts?
UDP port 69
42
Which Transmission Control Protocol (TCP) packet header field specifies the maximum number of unacknowledged bytes allowed at any given point of time?
the Window field
43
At which OSI Layer does the telnet command operate?
OSI Layer 7
44
Which protocol is connectionless: Simple Mail Transfer Protocol (SMTP) or User Datagram Protocol (UDP)?
User Datagram Protocol (UDP)
45
Which OSI Layer 2 hardware device is used to create separate collision domains?
switches
46
Which network devices operate at OSI Layer 1 and provide multiple ports to connect many hosts on the network?
Hubs
47
At which OSI layer does the Secure Sockets Layer (SSL) protocol operate?
OSI Layer 4 (Transport Layer)
48
Which TCP packet header field tells the sender how much data can be transmitted before the sender should stop and wait for acknowledgement?
the Window field
49
What is the size of the Sequence Number field in a TCP packet header?
32 bits
50
Which TCP port does File Transfer Protocol (FTP) use to communicate with other hosts?
TCP port 21
51
Which TCP packet header field indicates whether the header was damaged in transit?
the Checksum field
52
Which type of Ethernet cable is used to connect the 10/100 port on the switch to a hub?
a crossover cable
53
Which OSI Layer 2 devices provide hardware-based switching of LAN traffic?
LAN switches
54
What would be the broadcast address if the IP address given is192.168.2.1 and the subnet mask is 255.255.255.192?
192.168.2.63
55
Which TCP port does Post Office Protocol - Version 2 (POP2) use to communicate with other hosts?
TCP port 109
56
Which network device enables two hosts on dissimilar networks to communicate with each other?
a router
57
At which OSI Layer does the show cdp neighbors command operate?
OSI Layer 2
58
Which TCP port is used by the ICMP Echo feature to communicate network connectivity status messages for a target host?
TCP port 7
59
What type of cabling should be used when electrical issues may exist in the environment?
Fiber optic
60
Which device will provide network connectivity to 200 hosts on the LAN and allocate dedicated bandwidth to each of the hosts?
a switch
61
What is the size of the Windows field in a TCP packet header?
16 bits
62
Which TCP packet header field specifies the number assigned to the first byte of data in the message segment?
Sequence Number
63
What are the two types of IP addresses from the ISP point?
Public (registered) and Private
64
What is the size of the Control field in a TCP packet header?
6 bits
65
What would be the subnet mask if the IP address is 172.28.23.2, the maximum number of hosts per subnet is 254, and the maximum number of subnets possible is 256?
255.255.255.0
66
When default subnet masks are in use, what class of IP address is 133.6.5.4?
Class B
67
Which MS-DOS command will enable you to verify the default gateway configuration on a host that is unable to communicate with hosts across a local Cisco router?
the ipconfig command
68
Which UDP port does Domain Name Server (DNS) protocol use to communicate with other hosts?
UDP port 53
69
Given an IP address 200.1.1.130 with subnet mask 255.255.255.224, what would be the broadcast address for the subnet?
200.1.1.159
70
How many hosts per subnet can be accommodated with IP address 172.28.23.2 and subnet mask 255.255.240.0?
4094
71
Which type of Ethernet cable is used to connect the 10/100 port on the switch to a router?
a straight-through cable
72
Why does a switch-based network perform better than a hub-based network?
A switch provides a separate collision domain to each device, reducing collisions. If the cabling and NIC support it, switches also can provide a full duplex connection to hosts.
73
What three OSI Layer 3 parameters required to be configured on a host to communicate with hosts across the router?
IP address, subnet mask, and the default gateway
74
What are the components of an IP address?
network ID, host ID, and subnet ID
75
What is the default Transmission Control Protocol (TCP) segment payload (in bytes)?
536 bytes
76
What is the possible IP range that can be assigned to hosts on the subnet that includes the address 192.168.144.21/28?
192.168.144.17 - 192.168.144.30
77
Which TCP port does the World Wide Web (WWW) use to communicate with other hosts?
TCP port 80
78
Which TCP port does Post Office Protocol - Version 3 (POP3) use to communicate with other hosts?
TCP port 110
79
At which OSI Layer do the wireless access points operate?
OSI Layer 2
80
What is the subnet address for IP address 172.16.5.2/23?
subnet: 172.16.4.0
81
What is the name given to the protocol data unit (PDU) at the data link layer?
frame
82
What is the maximum number of subnets that will be created with IP address 192.168.2.1 and subnet mask 255.255.255.240?
16
83
Which ICMP message is sent by the router to the source host to use more efficient routing?
ICMP Redirect message
84
What is the broadcast address for IP address 172.16.5.2/23?
broadcast: 172.16.5.255
85
How many IP addresses are available for hosts in the 192.168.16.64/26 subnet?
62
86
Which Layer 2 devices provide wireless access to Wi-Fi enabled hosts on the network?
access points
87
At which OSI layer does the User Datagram Protocol (UDP) operate?
transport layer
88
Which network device provides filtering for packets based on the transport layer protocol specification?
routers, via the use of extended access control lists
89
What is the range of private address for Class B IP addresses?
172.16.0.0 to 172.31.255.255
90
Which type of IP address do you need to lease from Internet Network Information Center (InterNIC)?
Public IP address
91
Which TCP port does Simple Mail Transfer Protocol (SMTP) use to communicate with other hosts?
TCP port 25
92
How many fields are in a User Datagram Protocol (UDP) packet header?
four
93
How many octets of an IP address represent the network portion in a Class C address?
the first three octets
94
What is the term used for process in which the acknowledgement field in the TCP packet communicates information to the receiving host about next byte to be received?
forward acknowledgement
95
Which network device would you use to connect two networks on different IP subnets?
a router
96
Which OSI transport Layer protocol is used by Domain Name System (DNS) and Trivial File Transfer Protocol (TFTP)?
User Datagram Protocol (UDP)
97
The network device that only provides the conversion from copper based media transmission technology to optical fiber based media transmission technology operates at which OSI layer?
OSI Layer 1
98
Which TCP packet header field contains the sequence number of the next byte of data that will be sent to the sender of the packet?
the Acknowledgement Number field
99
What must be the value of the two most significant bits in a Class B IP address?
10
100
What would be the host IP address range, if the IP address given is192.168.2.1 and the mask bit is 29?
192.168.2.1 to 192.168.2.6
101
Which dedicated software or hardware device is used to permit, deny, or filter data packets based on different trust levels?
a firewall
102
Which type of ICMP message is generated when a router faces congestion at any of its interfaces?
ICMP Source Quench message
103
Which remote access protocol uses TCP port 23 to access remote host but exchange data in plain text?
the telnet command
104
Which Transmission Control Protocol (TCP) mechanism limits the amount of data transfer between two hosts to an acceptable speed?
flow control
105
Which international organization is primarily responsible for the allocation of domain name and IP address?
Internet Network Information Center (InterNIC)
106
Which OSI Layer 3 parameter misconfiguration will cause a host that can communicate on local segment, to receive IP packets from a host across a router but would not be able to reply to that host?
default gateway
107
Which network device provides a common connection point for network hosts and operates at OSI Layer 1?
a hub
108
Which OSI transport layer protocol is used by Simple Network Management Protocol (SNMP)?
User Datagram Protocol (UDP)
109
What is the name given to the realtime management of the number of packets handled by TCP that can be received without an acknowledgement?
windowing
110
What is the length of an Internet Protocol version 6 (IPv6) address?
128 bits
111
What is the unit of data at the OSI data link layer?
frames
112
What is the name of one data unit at the OSI network layer?
a packet
113
Which type of connector is used to connect a multimode fiber (MMF) cable to the 100Base-FX fiber-optic port on the catalyst switches?
an MT-RJ Fiber-Optic connector
114
Which TCP port does Hyper Text Transfer Protocol (HTTP) use to communicate with other hosts?
TCP port 80
115
What would be the host IP address range, if the IP address given is 172.28.23.2 and the subnet mask is 255.255.255.192?
172.28.23.1-172.28.23.62 (not counting the broadcast address and network ID)
116
How many fields are in a TCP packet header?
12
117
What type(s) of cabling is required for a 250-meter cable run?
Fiber or ThickNet coaxial
118
Which of the bridges and switches uses Application-Specific Integrated Circuits (ASIC's) for faster internal processing?
switches
119
At which layer of the OSI model does the windowing process occur to control the flow of data between sender and receiver?
transport layer

Cisco CCENT (5 decks)

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