CCNA 1 v3.1 Module 6 Review

2 What 3 things happen on an Ethernet network after a collision occurs? A backoff algorithm is invoked and transmission is stopped. The devices involved in the collision do not have priority to transmit data. The devices with data to transmit return to a listen-before-transmit mode.

3 What are 3 functions of CSMA/CD? transmitting and receiving data packets detecting errors within data packets or on the network decoding data packets and checking them for valid addresses before passing them to the upper layers of the OSI model

4 What addresses are included in the frame address field? source MAC address destination MAC address

5 Every generic frame has these 3 field names. What are they? data length frame check sequence

6 Ethernet standard specifications limit network service interruption. Select the items that describe the standards. (Choose three.) minimum segment length maximum segment length minimum number of stations per segment maximum number of stations per segment minimum number of repeaters between segments maximum number of repeaters between segments minimum segment length maximum segment length minimum number of stations per segment maximum number of stations per segment minimum number of repeaters between segments maximum number of repeaters between segments

7 Which characteristics of Ethernet contribute to its widespread use? (Name three.) ease of maintenance scalability low cost of installation

8 What does the word "Base" indicate in 10Base2? Baseband signaling is used.

9 Where does the MAC address originate? burned into ROM on the NIC card

10 What is the length of a MAC address? 48 bits

11 Regarding Ethernet: What standards are essentially the same? –802.3 (One way to remember this is that the 3 is a backward E) Can the bandwidth be increased without changing the underlying technology? –Yes Where was the original idea developed? –at the University of Hawaii

12 How is a MAC address represented? twelve hexadecimal digits

13 What 2 features describe the concept of Carrier Sense Multiple Access with Collision Detection? non-deterministic uses first-come, first-served approach

14 What is the name of the Layer 2 Protocol Data Unit (PDU)? frame

15 After an Ethernet collision, when the backoff algorithm is invoked, which device has priority to transmit data? any device in the collision domain whose backoff timer expires first

16 What are 2 features that describe Token Ring topology? collisionless environment. Deterministic –What does Deterministic mean? (Look it up)

17 In which two layers of the OSI model does Ethernet function? Data link Physical

18 What are the two sublayers of the OSI data link layer? Logical Link Control (LLC) Media Access Control (MAC)

19 Which ports on a hub forward traffic? all ports except the originating port

20 Name two characteristics that describe full-duplex Ethernet operation? Full duplex is preferred over half duplex in link establishment negotiation. Two methods of achieving a full duplex are auto-negotiation and administrative configuration.

21 How do Ethernet stations respond to collisions on the network? (Name three.) After the collison is detected by all stations, a backoff algorithm is implemented. Each station continues transmitting for a short while after a collison is detected. When a workstation delay period expires, it will attempt to gain access to the networking media

22 How are collisions detected on an Ethernet network? The signal on the networking media increases.

23 What is the purpose of the preamble in an Ethernet frame? is used for timing synchronization with alternating patterns of ones and zeros

24 Name 3 characteristics of Ethernet MAC addresses? 24 bit OUI and 24 bit serial number 6 pairs of hex digits physical address

25 Which IEEE standard defines a token ring network? 802.5