101.
Which network topology uses a token-based access methodology?
- A.Ethernet
- B.Star
- C.Bus
- D.Ring
- Answer & Explanation
- Report
Answer : [D]
Explanation :
Explanation :
| Token ring networks use a token-based access methodology. Each node connected to the network must wait for possession of the token before it can send traffic via the ring. |
102.
Hubs operate at what layer of the OSI model?
- A.Layer 1
- B.Layer 2
- C.Layer 3
- D.Layer 4
- Answer & Explanation
- Report
Answer : [A]
Explanation :
Explanation :
| Hubs operate at Layer 1, the Physical layer of the OSI model. Hubs simply forward the data they receive. There is no filtering or directing of traffic; thus, they are categorized at Layer 1. |
103.
What is the proper sequence of the TCP three-way-handshake?
- A.SYN-ACK, ACK, ACK
- B.SYN, SYN-ACK, ACK
- C.SYN-SYN, SYN-ACK, SYN
- D.ACK, SYN-ACK, SYN
- Answer & Explanation
- Report
Answer : [B]
Explanation :
Explanation :
| Remember this three-way handshake sequence; you will see it quite a bit in packet captures when sniffing the network. Being able to identify the handshake process allows you to quickly find the beginning of a data transfer. |
104.
Which of these protocols is a connection-oriented protocol?
- A.FTP
- B.UDP
- C.POP3
- D.TCP
- Answer & Explanation
- Report
Answer : [D]
Explanation :
Explanation :
| Transmission Control Protocol (TCP) is a connection-oriented protocol that uses the three-way-handshake to confirm that a connection is established. FTP and POP3 use connections, but they are not connection-oriented protocols. |
105.
A scan of a network client shows that port 23 is open; what protocol is this aligned
with?
- A.Telnet
- B.NetBIOS
- C.DNS
- D.SMTP
- Answer & Explanation
- Report
Answer : [A]
Explanation :
Explanation :
| Port 23 is used for Telnet traffic. |
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