Thursday, February 28, 2008
Wednesday, February 27, 2008
Feb.27,2008
Chapter 4 KEY TERMS
100Base T-An Ethernet standard that provides a 100-Mbps baseband transfer rate over twisted-pair cabling.
10Base 2-An Ethernet standard that specifies a 10-Mbps baseband transmission over thin Ethernet; the maximum transmission distance of any single segment is 185 meters.
10Base 5-An Ethernet standard that indicates a 10-Mbps baseband transmission over a maximum segment length of 500 meters; type of cable used in this standard is called thick Ethernet, or thicknet, and uses RG-8 coaxial cable.
10Base T-An Ethernet standard that specifies a 10-Mbps baseband transmission over twisted-pair cabling; the maximum segment length is 100 meters.
10 Gigabit Ethernet-IEEE 802.3ae standard that uses Ethernet frames in full duplex mode over fiber only. Used extensively in MANs for distances up to 40 km over single-mode fiber.
5-4-3 rule-The rule that stipulates that between stations on a LAN, there can be no more than five network segments connected, the maximum number of repeaters between the segments is four and the maximum number of segments with stations on them is three.
802.2-A standard of the IEEE that specifies the subdivision of the Logical Link Control sublayer from the Media Access Control sublayer. These sublayers are part of the OSI Data Link layer.
802.3-The IEEE standard that defines CSM
100Base T-An Ethernet standard that provides a 100-Mbps baseband transfer rate over twisted-pair cabling.
10Base 2-An Ethernet standard that specifies a 10-Mbps baseband transmission over thin Ethernet; the maximum transmission distance of any single segment is 185 meters.
10Base 5-An Ethernet standard that indicates a 10-Mbps baseband transmission over a maximum segment length of 500 meters; type of cable used in this standard is called thick Ethernet, or thicknet, and uses RG-8 coaxial cable.
10Base T-An Ethernet standard that specifies a 10-Mbps baseband transmission over twisted-pair cabling; the maximum segment length is 100 meters.
10 Gigabit Ethernet-IEEE 802.3ae standard that uses Ethernet frames in full duplex mode over fiber only. Used extensively in MANs for distances up to 40 km over single-mode fiber.
5-4-3 rule-The rule that stipulates that between stations on a LAN, there can be no more than five network segments connected, the maximum number of repeaters between the segments is four and the maximum number of segments with stations on them is three.
802.2-A standard of the IEEE that specifies the subdivision of the Logical Link Control sublayer from the Media Access Control sublayer. These sublayers are part of the OSI Data Link layer.
802.3-The IEEE standard that defines CSM
Tuesday, February 26, 2008
Monday, February 25, 2008
Friday, February 22, 2008
Thursday, February 21, 2008
Tuesday, February 19, 2008
Monday, February 18, 2008
Friday, February 15, 2008
Thursday, February 14, 2008
Wednesday, February 13, 2008
Tuesday, February 12, 2008
Thursday, February 7, 2008
Feb. 7,2008
Chapter 2 (Review Questions)
1.Routers operate at which layer of the OSI model?
Network Layer
2.Bridges operate at which layer of the OSI model?
Data Link
3.Bridges provide which of the following benefits?
Reduced network traffic ,Minimized collisions
4.Which of the following is an appropriate description of a broadcast storm?
An error condition in which many broadcasts are simultaneously across the entire network
5.Which of the following best describes a network segment?
Network segmentation is an essential concept you must understand to complete the CCNA exam successfully and understand the contents of this book.
6.A router that has eight ports will require how many IP addresses?
Eight
7.If a bridge receives a frame that has a destination MAC address located on the same segment from which it came, what will happen to the frame at the bridge?
It will be forwarded
8.Which of the following is not true about brides?
Bridges do not forward broadcast traffic
9.Which of the following is not true about routers?
Routers operate at the Network layer
10.Which of the following is not true about switches?
Switches operate at the Data Link layer
11.Which type of addresses do routers use?
Logical
12.A bridge can reduce broadcast traffic.
13.Which of the following is the correct name for a device that operates at both the Data Link and Network layers of the OSI reference model?
switches
14.When two stations broadcast at the same time on a single segment of an Ethernet network, what happens?
collision
15.Which type of addresses do bridges use?
16.When must you change the IP address of a given host on a network segmented with routers?
17.Which of the following OSI layers contains media access control information?
18.A switch divides network communications at which layer of the oSI model?
19.Which of the following devices translates between different protocols?
20.Rank the following devices from lowest to highest latency.
21.Typically, which is the best device increasing performance on your LAN?
22.What kind of bridges do Ethernet networks use?
23.What kind of bridges will connect an Ethernet network to a Token Ring network?
24.Why don't repeaters and hubs segment the network?
25.Another name for IP address is _____________ address, and another name for a MAC address is _____________ address.
26.What device provides functions similr to a hub in wireless networks?
1.Routers operate at which layer of the OSI model?
Network Layer
2.Bridges operate at which layer of the OSI model?
Data Link
3.Bridges provide which of the following benefits?
Reduced network traffic ,Minimized collisions
4.Which of the following is an appropriate description of a broadcast storm?
An error condition in which many broadcasts are simultaneously across the entire network
5.Which of the following best describes a network segment?
Network segmentation is an essential concept you must understand to complete the CCNA exam successfully and understand the contents of this book.
6.A router that has eight ports will require how many IP addresses?
Eight
7.If a bridge receives a frame that has a destination MAC address located on the same segment from which it came, what will happen to the frame at the bridge?
It will be forwarded
8.Which of the following is not true about brides?
Bridges do not forward broadcast traffic
9.Which of the following is not true about routers?
Routers operate at the Network layer
10.Which of the following is not true about switches?
Switches operate at the Data Link layer
11.Which type of addresses do routers use?
Logical
12.A bridge can reduce broadcast traffic.
13.Which of the following is the correct name for a device that operates at both the Data Link and Network layers of the OSI reference model?
switches
14.When two stations broadcast at the same time on a single segment of an Ethernet network, what happens?
collision
15.Which type of addresses do bridges use?
16.When must you change the IP address of a given host on a network segmented with routers?
17.Which of the following OSI layers contains media access control information?
18.A switch divides network communications at which layer of the oSI model?
19.Which of the following devices translates between different protocols?
20.Rank the following devices from lowest to highest latency.
21.Typically, which is the best device increasing performance on your LAN?
22.What kind of bridges do Ethernet networks use?
23.What kind of bridges will connect an Ethernet network to a Token Ring network?
24.Why don't repeaters and hubs segment the network?
25.Another name for IP address is _____________ address, and another name for a MAC address is _____________ address.
26.What device provides functions similr to a hub in wireless networks?
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