Question 1

Which of the following protocols are used to establish a point-to-point serial link?&#10;A) H.323&#10;B) HDLC&#10;C) PPP&#10;D) PPTP&#10;E) TCP&#10;F) UDP&#10;G) IP

Accepted Answer

B) HDLC and PPP are correct because both can be used to establish the serial link; which one to use just depends on the manufacturer of the two routers.
C) HDLC and PPP are correct because both can be used to establish the serial link; which one to use just depends on the manufacturer of the two routers.

Question 2

What is the physical rate of transmission of a T1 leased line?&#10;A) 10 Mbps&#10;B) 100 Mbps&#10;C) 44.455 Mbps&#10;D) 1.544 Mbps&#10;E) 2 Mbps&#10;F) 5.455 Mbps

Accepted Answer

D) A T1 is an older style of telecommunications leased line that offers a physical transmission rate of 1.544 Mbps.

Question 3

What is the difference between the ISO version of HDLC and the Cisco version of HDLC that is used, by default, on all serial interfaces?&#10;A) Type field&#10;B) Protocol field&#10;C) Authentication support&#10;D) Optimized header&#10;E) Encryption support

Accepted Answer

A) The Cisco version of HDLC adds a Type field that enables the routers to know which type of packet is inside each frame.

Question 4

Which technology is commonly implemented inside a service provider's (SP) network and provides an Ethernet point-to-point connection between customer devices?&#10;A) eBGP&#10;B) EoMPLS&#10;C) Leased line&#10;D) Frame Relay&#10;E) ATM

Accepted Answer

B) The Ethernet over Multiprotocol Label Switching (EoMPLS) technology is commonly used within service provider networks to offer point-to-point Ethernet (as well as other) services.

Question 5

What protocol standard is used when utilizing an Ethernet emulation point-to-point link?&#10;A) IEEE 802.11&#10;B) IEEE 802.5&#10;C) IEEE 802.3&#10;D) ISO 4507&#10;E) ISO 1431

Accepted Answer

C) Ethernet emulation technologies, such as Ethernet over Multiprotocol Label Switching (EoMPLS), utilize the same IEEE 802.3 Ethernet standard for transmission that is used on Ethernet LANs.

Question 6

The Internet is essentially one big ________ network.&#10;A) OSI&#10;B) iBGP&#10;C) EGP&#10;D) TCP/IP&#10;E) Ethernet

Accepted Answer

D) The term Internet actually comes from the name of the protocol being used, the Internet protocol (IP); typically it is referred to as a TCP/IP network. The Transmission Control Protocol (TCP) is one of the most commonly used Layer 4 protocols (OSI), whereas IP (or IPv6) is always used on the Internet for communications at Layer 3 (OSI).

Question 7

Which HDLC field is equivalent to the preamble in Ethernet?&#10;A) Flag&#10;B) Address&#10;C) Control&#10;D) FCS

Accepted Answer

A) The flag in HDLC and the preamble in Ethernet both provide a recognizable bit pattern so that the receiving nodes realize a new frame is arriving.

Question 8

Which of the following fields in HDLC does not exist in Ethernet and is typically considered outmoded for modern links between routers?&#10;A) Flag&#10;B) Address&#10;C) Control&#10;D) FCS

Accepted Answer

C) The control field is no longer necessary in most cases and it has no equivalent in Ethernet. It is the only field that does not have an equivalent in Ethernet.

Deck 3: Fundamentals of Wans and IP Routing