Q: What is a question about this article? If the question is unanswerable, say "unanswerable".
There are two basic forms of data packet, DATA0 and DATA1. A data packet must always be preceded by an address token, and is usually followed by a handshake token from the receiver back to the transmitter. The two packet types provide the 1-bit sequence number required by Stop-and-wait ARQ. If a USB host does not receive a response (such as an ACK) for data it has transmitted, it does not know if the data was received or not; the data might have been lost in transit, or it might have been received but the handshake response was lost.
There are two basic forms of data packet, what are they?
A: DATA0 and DATA1

Q: What is a question about this article? If the question is unanswerable, say "unanswerable".
Anthropologists, along with other social scientists, are working with the US military as part of the US Army's strategy in Afghanistan. The Christian Science Monitor reports that "Counterinsurgency efforts focus on better grasping and meeting local needs" in Afghanistan, under the Human Terrain System (HTS) program; in addition, HTS teams are working with the US military in Iraq. In 2009, the American Anthropological Association's Commission on the Engagement of Anthropology with the US Security and Intelligence Communities released its final report concluding, in part, that, "When ethnographic investigation is determined by military missions, not subject to external review, where data collection occurs in the context of war, integrated into the goals of counterinsurgency, and in a potentially coercive environment – all characteristic factors of the HTS concept and its application – it can no longer be considered a legitimate professional exercise of anthropology. In summary, while we stress that constructive engagement between anthropology and the military is possible, CEAUSSIC suggests that the AAA emphasize the incompatibility of HTS with disciplinary ethics and practice for job seekers and that it further recognize the problem of allowing HTS to define the meaning of "anthropology" within DoD."
What does the AAA feel is incompatible with working with the military?
A: ethics

Q: What is a question about this article? If the question is unanswerable, say "unanswerable".
Athanasius knew Greek and admitted not knowing Hebrew [see, e.g., the 39th Festal Letter of St. Athan.]. The Old Testament passages he quotes frequently come from the Septuagint Greek translation. Only rarely did he use other Greek versions (to Aquila once in the Ecthesis, to other versions once or twice on the Psalms), and his knowledge of the Old Testament was limited to the Septuagint. Nonetheless, during his later exile, with no access to a copy of the Scriptures, Athanasius could quote from memory every verse in the Old Testament with a supposed reference to the Trinity without missing any.[citation needed] The combination of Scriptural study and of Greek learning was characteristic of the famous Alexandrian School.
What did students learn in the school in Alexandria?
A: Scriptural study and of Greek

Q: What is a question about this article? If the question is unanswerable, say "unanswerable".
Often compared to San Francisco due to the hilly terrain and steep maze of residential streets, housing in St. John's is typically painted in bright colours. The city council has implemented strict heritage regulations in the downtown area, including restrictions on the height of buildings. These regulations have caused much controversy over the years. With the city experiencing an economic boom a lack of hotel rooms and office space has seen proposals put forward that do not meet the current height regulations. Heritage advocates argue that the current regulations should be enforced while others believe the regulations should be relaxed to encourage economic development.
What US city is St. John's often compared to?
A:
San Francisco